diff --git a/docs/api/openapi.yaml b/docs/api/openapi.yaml
index a7a7c1148..c65593eab 100644
--- a/docs/api/openapi.yaml
+++ b/docs/api/openapi.yaml
@@ -23472,11 +23472,11 @@ paths:
         - in: query
           name: values
           schema:
-            description: Comma-separated value series to include, as `MeasurementType` names or `MOOD`, at most 6. More, or an
-              unknown name, answers 422.
+            description: Comma-separated value series to include, as `MeasurementType` names or `MOOD`. A name given twice counts
+              once, so the list is bounded by the names that exist; an unknown name answers 422.
             type: string
-          description: Comma-separated value series to include, as `MeasurementType` names or `MOOD`, at most 6. More, or an
-            unknown name, answers 422.
+          description: Comma-separated value series to include, as `MeasurementType` names or `MOOD`. A name given twice counts
+            once, so the list is bounded by the names that exist; an unknown name answers 422.
       responses:
         "200":
           description: The timeline for the requested zoom and window.
@@ -81664,6 +81664,13 @@ components:
           type: array
           items:
             $ref: "#/components/schemas/TimelineSeries"
+        availableSeries:
+          type: array
+          items:
+            type: string
+          description: "Every value series this record can show, whatever the window: the `MeasurementType` names with live
+            readings that the caller may see (events excluded), and `MOOD` when the mood score is visible and has
+            entries. Each may be named in `values`."
         notable:
           type: array
           items:
@@ -81690,6 +81697,7 @@ components:
         - standing
         - bucket
         - series
+        - availableSeries
         - notable
       additionalProperties: false
     TimelineItem:
@@ -81750,6 +81758,12 @@ components:
           anyOf:
             - type: string
             - type: "null"
+        group:
+          anyOf:
+            - type: string
+            - type: "null"
+          description: "Items that belong to one thing share a group and are drawn on one row: a medication's own span, its
+            courses, its dose changes and its pauses all carry the medication's id. Null for an item that stands alone."
       required:
         - id
         - kind
@@ -81761,6 +81775,7 @@ components:
         - label
         - sub
         - href
+        - group
       additionalProperties: false
     TimelineStandingItem:
       type: object
diff --git a/e2e/timeline.spec.ts b/e2e/timeline.spec.ts
index 857d6e83f..ed0f4e542 100644
--- a/e2e/timeline.spec.ts
+++ b/e2e/timeline.spec.ts
@@ -125,11 +125,25 @@ test("the timeline hands the selected day to the day view through ?day=", async
   ).toHaveCount(0);
   const asked = log.timelineQueries.at(-1)?.get("values")?.split(",") ?? [];
   expect(asked.length).toBeGreaterThan(0);
-  expect(asked.length).toBeLessThanOrEqual(6);
 
   // Before anyone picks a day the bar opens on the newest bucket it has
   // something for, says so in its head, and says how to pick another.
   const bar = page.locator('[data-slot="timeline-selection-bar"]');
+  // It sits on the card's own surface under a hairline, not in a grey box,
+  // and the legend under it is set off by a hairline of its own.
+  const surface = await bar.evaluate((el) => {
+    const style = getComputedStyle(el);
+    return {
+      background: style.backgroundColor,
+      borderTop: style.borderTopWidth,
+    };
+  });
+  expect(surface.background).toBe("rgba(0, 0, 0, 0)");
+  expect(surface.borderTop).toBe("1px");
+  await expect(page.locator('[data-slot="timeline-legend"]')).toHaveCSS(
+    "border-top-width",
+    "1px",
+  );
   await expect(bar).toHaveAttribute("data-bucket", "quarter");
   await expect(bar).toHaveAttribute(
     "data-period-from",
@@ -178,7 +192,7 @@ test("the timeline hands the selected day to the day view through ?day=", async
   await expect(page).toHaveURL(/[?&]day=\d{4}-\d{2}-\d{2}/);
 });
 
-test("value lines: quarterly means, gaps kept, short ones bridged, up to six lines", async ({
+test("value lines: quarterly means, gaps kept, short ones bridged, as many as the record has", async ({
   page,
 }) => {
   await setTimelineModuleOn(page);
@@ -212,34 +226,63 @@ test("value lines: quarterly means, gaps kept, short ones bridged, up to six lin
     ),
   ).toBeAttached();
 
-  // Six value lines can be chosen; a seventh cannot.
-  await page.locator('[data-slot="timeline-values-trigger"]').click();
+  // The legend explains the dashed stroke and the hollow point.
+  await expect(
+    page.locator('[data-slot="timeline-legend-gap"] svg'),
+  ).toBeVisible();
+  await expect(
+    page.locator('[data-slot="timeline-legend-thin"] svg'),
+  ).toBeVisible();
+
+  // The picker is one button that counts the lines; the chosen ones are
+  // not listed beside it.
+  const trigger = page.locator('[data-slot="timeline-values-trigger"]');
+  await expect(trigger).toHaveAttribute("data-count", "3");
+  await expect(trigger).toHaveText(/\(3\)/);
+  const toolbarHeight = await trigger.evaluate(
+    (el) => el.parentElement!.getBoundingClientRect().height,
+  );
+
+  // No cap: every series the record has can be chosen, fifteen here.
+  await trigger.click();
   const options = page.locator('[data-slot="timeline-values-option"]');
   await expect(options.first()).toBeVisible();
   const count = await options.count();
+  expect(count).toBe(15);
+  await expect(
+    page.locator('[data-slot="timeline-values-option"][data-disabled]'),
+  ).toHaveCount(0);
   for (let i = 0; i < count; i++) {
-    const checked = page.locator(
-      '[data-slot="timeline-values-option"][aria-checked="true"]',
-    );
-    if ((await checked.count()) >= 6) break;
     const option = options.nth(i);
     if ((await option.getAttribute("aria-checked")) === "true") continue;
     await option.click();
   }
   await expect(
     page.locator('[data-slot="timeline-values-option"][aria-checked="true"]'),
-  ).toHaveCount(6);
-  await expect(
-    page.locator(
-      '[data-slot="timeline-values-option"][aria-checked="false"][data-disabled]',
-    ),
-  ).toHaveCount(count - 6);
+  ).toHaveCount(15);
+  // The menu marks each chosen line with its colour.
+  const dots = await page
+    .locator(
+      '[data-slot="timeline-values-option"][aria-checked="true"] [data-slot="timeline-values-dot"]',
+    )
+    .evaluateAll((els) =>
+      els.map((el) => getComputedStyle(el).backgroundColor),
+    );
+  expect(dots).toHaveLength(15);
   await page.keyboard.press("Escape");
   await expect
     .poll(() => log.timelineQueries.at(-1)?.get("values")?.split(",").length)
-    .toBe(6);
-  await expect(page.locator("svg [data-series]")).toHaveCount(6);
-  // Each line in its own colour, and every mark of a line in that colour.
+    .toBe(15);
+  await expect(page.locator("svg [data-series]")).toHaveCount(15);
+  await expect(trigger).toHaveAttribute("data-count", "15");
+  // The toolbar did not grow with the choice.
+  expect(
+    await trigger.evaluate(
+      (el) => el.parentElement!.getBoundingClientRect().height,
+    ),
+  ).toBe(toolbarHeight);
+  // Each line in one colour, every mark of a line in that colour, the five
+  // data colours repeating past the fifth line.
   const colours = await page
     .locator("svg [data-series]")
     .evaluateAll((groups) =>
@@ -252,30 +295,60 @@ test("value lines: quarterly means, gaps kept, short ones bridged, up to six lin
         ].map((m) => getComputedStyle(m).stroke),
       })),
     );
-  expect(new Set(colours.map((c) => c.colour)).size).toBe(6);
+  expect(new Set(colours.map((c) => c.colour)).size).toBe(5);
   for (const { colour, marks } of colours) {
     expect(marks.length).toBeGreaterThan(0);
     for (const stroke of marks) expect(stroke).toBe(colour);
   }
-  // The menu marks each chosen line with the same colour.
-  const trigger = page.locator('[data-slot="timeline-values-trigger"]');
-  await expect(async () => {
-    if ((await trigger.getAttribute("data-state")) !== "open") {
-      await trigger.click();
-    }
-    await expect(trigger).toHaveAttribute("data-state", "open", {
-      timeout: 1_000,
-    });
-  }).toPass();
-  const chosenDots = page.locator(
-    '[data-slot="timeline-values-option"][aria-checked="true"] [data-slot="timeline-values-dot"]',
-  );
-  await expect(chosenDots).toHaveCount(6);
-  const dots = await chosenDots.evaluateAll((els) =>
-    els.map((el) => getComputedStyle(el).backgroundColor),
-  );
   expect(new Set(dots)).toEqual(new Set(colours.map((c) => c.colour)));
-  await page.keyboard.press("Escape");
+  // The rows run on down the page, which scrolls; the last one is reached.
+  const last = page.locator("svg [data-series]").last();
+  await last.scrollIntoViewIfNeeded();
+  await expect(last).toBeInViewport();
+});
+
+test("one medication is one row: its doses cut the bar, its pause is a gap in it", async ({
+  page,
+}) => {
+  await setTimelineModuleOn(page);
+  await mockTimeline(page, "full", TODAY);
+  await page.goto("/timeline");
+  const lane = page.locator('svg [data-lane="medications"]');
+  await expect(lane).toBeVisible({ timeout: 20_000 });
+  // The medication's own span is not drawn beside its course.
+  await expect(lane.locator('[data-item="mj"]')).toHaveCount(0);
+  const pieces = lane.locator('[data-item="mj-course"]');
+  await expect(pieces).toHaveCount(3);
+  expect(
+    await pieces.evaluateAll((els) => els.map((el) => el.dataset.dose)),
+  ).toEqual(["2,5 mg", "5 mg", "7,5 mg"]);
+  const rowOf = (selector: string) =>
+    lane
+      .locator(selector)
+      .evaluateAll((els) => [...new Set(els.map((el) => el.dataset.row))]);
+  const mounjaroRow = await rowOf('[data-item="mj-course"]');
+  expect(mounjaroRow).toHaveLength(1);
+  expect(await rowOf('[data-kind="pause"][data-item="mj-pause"]')).toEqual(
+    mounjaroRow,
+  );
+  // Three winter courses of one medication share one row of their own.
+  const vitamin = await rowOf('[data-item^="c-"]');
+  expect(vitamin).toHaveLength(1);
+  expect(vitamin).not.toEqual(mounjaroRow);
+  // Four medications, four rows.
+  const rows = await lane
+    .locator("[data-row]")
+    .evaluateAll((els) => new Set(els.map((el) => el.dataset.row)).size);
+  expect(rows).toBe(4);
+  // A zoom change redraws the pieces: none is left behind from the last
+  // window (each piece has a key of its own).
+  const zoom = (value: string) =>
+    page.locator(`[data-slot="timeline-zoom"] [data-value="${value}"]`);
+  await zoom("year").click();
+  await expect(page).toHaveURL(/zoom=year/);
+  await zoom("all").click();
+  await expect(page).toHaveURL(/zoom=all/);
+  await expect(pieces).toHaveCount(3);
 });
 
 /** `days` calendar days before `key`. */
@@ -296,20 +369,35 @@ test("a chosen range lives in the URL: reload keeps it, Back returns to it", asy
   const zoom = (value: string) =>
     page.locator(`[data-slot="timeline-zoom"] [data-value="${value}"]`);
 
-  // Choosing "Range" starts from what is on screen and writes it down.
+  // Choosing "Range" opens its fields over the page, anchored to the
+  // segment: the chart does not move, and the URL waits for "Apply".
+  const before = await chart.boundingBox();
   await zoom("range").click();
+  const popover = page.locator('[data-slot="timeline-range-popover"]');
+  await expect(popover).toBeVisible();
+  const fields = popover.locator('[data-slot="timeline-range"]');
+  await expect(fields).toBeVisible();
+  expect(await chart.boundingBox()).toEqual(before);
+  await expect(desktop.locator('[data-slot="timeline-range"]')).toHaveCount(0);
+  expect(page.url()).not.toContain("zoom=range");
+  const anchor = await zoom("range").boundingBox();
+  const box = await popover.boundingBox();
+  expect(box!.y).toBeGreaterThanOrEqual(anchor!.y + anchor!.height);
+  expect(Math.abs(box!.x - anchor!.x)).toBeLessThan(24);
+  // Starts from what is on screen; "Apply" writes it down.
+  await popover.locator('[data-slot="timeline-range-apply"]').click();
+  await expect(popover).toHaveCount(0);
   await expect(page).toHaveURL(
     /[?&]zoom=range&from=\d{4}-\d{2}-\d{2}&to=\d{4}-\d{2}-\d{2}/,
   );
-  const fields = desktop.locator('[data-slot="timeline-range"]');
-  await expect(fields).toBeVisible();
 
   // Three weeks: daily means, the bar headed by one day.
   const from = daysBefore(TODAY, 20);
-  const start = desktop.locator('[data-testid="timeline-range-from"]');
   await page.goto(`/timeline?zoom=range&from=${from}&to=${TODAY}`);
-  await expect(fields).toHaveAttribute("data-from", from, { timeout: 20_000 });
-  await expect(fields).toHaveAttribute("data-to", TODAY);
+  await expect(desktop).toHaveAttribute("data-from", from, {
+    timeout: 20_000,
+  });
+  await expect(desktop).toHaveAttribute("data-to", TODAY);
   await expect(zoom("range")).toHaveAttribute("aria-checked", "true");
   await expect(
     page.locator('[data-slot="timeline-legend-mean"]'),
@@ -324,20 +412,26 @@ test("a chosen range lives in the URL: reload keeps it, Back returns to it", asy
 
   // A reload keeps it.
   await page.reload();
-  await expect(fields).toHaveAttribute("data-from", from, { timeout: 20_000 });
+  await expect(desktop).toHaveAttribute("data-from", from, {
+    timeout: 20_000,
+  });
 
   // A fixed zoom replaces it; Back brings it back.
   await zoom("year").click();
   await expect(page).toHaveURL(/[?&]zoom=year$/);
-  await expect(fields).toHaveCount(0);
+  await expect(desktop).not.toHaveAttribute("data-from", from);
   await page.goBack();
   await expect(page).toHaveURL(new RegExp(`zoom=range&from=${from}`));
-  await expect(fields).toHaveAttribute("data-from", from);
+  await expect(desktop).toHaveAttribute("data-from", from);
 
-  // Typing a start moves the range and the URL with it.
+  // Typing a start in the popover moves the range once it is applied.
   const later = daysBefore(TODAY, 10);
+  await zoom("range").click();
+  const start = popover.locator('[data-testid="timeline-range-from"]');
   await start.fill(later);
   await start.press("Enter");
+  expect(page.url()).toContain(`from=${from}`);
+  await popover.locator('[data-slot="timeline-range-apply"]').click();
   await expect(page).toHaveURL(new RegExp(`from=${later}&to=${TODAY}`));
 
   // A parameter it cannot read opens the whole record.
@@ -345,7 +439,7 @@ test("a chosen range lives in the URL: reload keeps it, Back returns to it", asy
   await expect(zoom("all")).toHaveAttribute("aria-checked", "true", {
     timeout: 20_000,
   });
-  await expect(fields).toHaveCount(0);
+  await expect(desktop).toHaveAttribute("data-zoom", "all");
 });
 
 async function setTimelineModuleOn(page: Page) {
@@ -423,6 +517,27 @@ test("on a phone the chronicle replaces the chart and opens a day per row", asyn
     means.first().locator('[data-slot="timeline-series-dot"]').first(),
   ).toBeVisible();
 
+  // One medication, one start: its course and its own span are one row,
+  // with the dose taken then.
+  const started = chronicle.locator(
+    '[data-slot="timeline-chronicle-row"][data-date="2025-01-06"]',
+  );
+  await expect(started).toHaveCount(1);
+  await expect(started).toContainText("Mounjaro");
+  await expect(started).toContainText("2,5 mg");
+  await expect(chronicle).not.toContainText("·");
+
+  // A range is chosen in a sheet; the list underneath does not move.
+  const listTop = (await chronicle.boundingBox())!.y;
+  await page.locator('[data-slot="timeline-range-toggle"]').click();
+  const sheet = page.locator('[data-slot="responsive-sheet-content"]');
+  await expect(sheet.locator('[data-slot="timeline-range"]')).toBeVisible();
+  expect((await chronicle.boundingBox())!.y).toBe(listTop);
+  await sheet.locator('[data-slot="timeline-range-apply"]').click();
+  await expect(page).toHaveURL(/[?&]zoom=range&from=\d{4}-\d{2}-\d{2}/);
+  await page.goto("/timeline");
+  await expect(chronicle).toBeVisible({ timeout: 20_000 });
+
   await page
     .locator(
       '[data-slot="timeline-chronicle-row"][data-date="2026-01-03"] button',
diff --git a/e2e/utils/mock-timeline.ts b/e2e/utils/mock-timeline.ts
index f43a4f72a..c99ebda10 100644
--- a/e2e/utils/mock-timeline.ts
+++ b/e2e/utils/mock-timeline.ts
@@ -22,6 +22,8 @@ type Item = {
   label: string;
   sub: string | null;
   href: string | null;
+  /** The medication an item belongs to; one row per group. */
+  group: string | null;
 };
 
 function item(over: Partial<Item> & Pick<Item, "id" | "kind" | "start">): Item {
@@ -33,6 +35,7 @@ function item(over: Partial<Item> & Pick<Item, "id" | "kind" | "start">): Item {
     label: over.id,
     sub: null,
     href: null,
+    group: null,
     ...over,
   };
 }
@@ -204,6 +207,28 @@ function series(dataFrom: string, today: string, bucket: Bucket) {
   ];
 }
 
+/**
+ * Every series the `full` record can show: fifteen, past the five colours
+ * and past the six lines the chart used to stop at.
+ */
+export const FULL_AVAILABLE = [
+  "WEIGHT",
+  "BLOOD_PRESSURE_SYS",
+  "BLOOD_PRESSURE_DIA",
+  "PULSE",
+  "BODY_FAT",
+  "SLEEP_DURATION",
+  "ACTIVITY_STEPS",
+  "BLOOD_GLUCOSE",
+  "OXYGEN_SATURATION",
+  "HEART_RATE_VARIABILITY",
+  "RESTING_HEART_RATE",
+  "VO2_MAX",
+  "BODY_TEMPERATURE",
+  "RESPIRATORY_RATE",
+  "MOOD",
+];
+
 export function fullTimeline(today: string) {
   const vaccinations = [
     "2020-06-10",
@@ -348,6 +373,7 @@ export function fullTimeline(today: string) {
         items: [
           item({
             id: "med-1",
+            group: "med-1",
             kind: "medication",
             start: "2019-04-02",
             open: true,
@@ -356,6 +382,7 @@ export function fullTimeline(today: string) {
           }),
           item({
             id: "dose-1",
+            group: "med-1",
             kind: "doseChange",
             start: "2020-08-12",
             label: "Ramipril",
@@ -363,13 +390,58 @@ export function fullTimeline(today: string) {
           }),
           item({
             id: "med-2",
+            group: "med-2",
             kind: "medication",
             start: "2022-11-03",
             end: "2022-12-10",
             label: "Ibuprofen",
           }),
+          // One medication sent as its own span, a course, three dose
+          // changes and a pause: the case the beta drew as two medications.
+          item({
+            id: "mj",
+            group: "mj",
+            kind: "medication",
+            start: "2025-01-06",
+            open: true,
+            label: "Mounjaro",
+            sub: "7,5 mg",
+          }),
+          item({
+            id: "mj-course",
+            group: "mj",
+            kind: "course",
+            start: "2025-01-06",
+            open: true,
+            label: "Mounjaro",
+          }),
+          ...(
+            [
+              ["mj-25", "2025-01-06", "2,5 mg"],
+              ["mj-5", "2025-03-03", "5 mg"],
+              ["mj-75", "2025-06-02", "7,5 mg"],
+            ] as const
+          ).map(([id, start, sub]) =>
+            item({
+              id,
+              group: "mj",
+              kind: "doseChange",
+              start,
+              label: "Mounjaro",
+              sub,
+            }),
+          ),
+          item({
+            id: "mj-pause",
+            group: "mj",
+            kind: "pause",
+            start: "2025-08-01",
+            end: "2025-08-20",
+            label: "Mounjaro",
+          }),
           item({
             id: "c-1",
+            group: "vit-d",
             kind: "course",
             start: "2023-11-01",
             end: "2024-03-31",
@@ -377,6 +449,7 @@ export function fullTimeline(today: string) {
           }),
           item({
             id: "c-2",
+            group: "vit-d",
             kind: "course",
             start: "2024-11-01",
             end: "2025-03-31",
@@ -384,6 +457,7 @@ export function fullTimeline(today: string) {
           }),
           item({
             id: "c-3",
+            group: "vit-d",
             kind: "course",
             start: "2025-11-01",
             end: "2026-03-31",
@@ -437,6 +511,7 @@ export function fullTimeline(today: string) {
     standing: [],
     bucket: "quarter" as Bucket,
     series: series("2019-01-01", today, "quarter"),
+    availableSeries: FULL_AVAILABLE,
     notable: [{ date: "2026-01-04", kind: "extremeHigh" }],
   };
 }
@@ -482,6 +557,7 @@ export function readyTimeline(today: string) {
         items: [
           item({
             id: "med-1",
+            group: "med-1",
             kind: "medication",
             start: "2024-05-01",
             open: true,
@@ -491,6 +567,7 @@ export function readyTimeline(today: string) {
           }),
           item({
             id: "c-2",
+            group: "vit-d",
             kind: "course",
             start: "2024-11-01",
             end: "2025-03-31",
@@ -498,6 +575,7 @@ export function readyTimeline(today: string) {
           }),
           item({
             id: "c-3",
+            group: "vit-d",
             kind: "course",
             start: "2025-11-01",
             end: "2026-03-31",
@@ -558,6 +636,7 @@ export function readyTimeline(today: string) {
     series: series("2024-05-01", today, "quarter").filter(
       (s) => s.key !== "RESTING_HEART_RATE",
     ),
+    availableSeries: ["BLOOD_PRESSURE_SYS", "BLOOD_PRESSURE_DIA", "WEIGHT"],
     notable: [],
   };
 }
diff --git a/messages/de.json b/messages/de.json
index be19a50e3..69f274667 100644
--- a/messages/de.json
+++ b/messages/de.json
@@ -12308,7 +12308,7 @@
     "title": "Zeitleiste",
     "subtitle": "Was wann war, neben deinen Werten.",
     "standing": "Dauerhaft",
-    "startMissing": "Startdatum fehlt",
+    "startUnknown": "Beginn unbekannt",
     "openDay": "{date} öffnen",
     "zoom": {
       "all": "Alles",
@@ -12433,6 +12433,7 @@
     "legendMeanMonth": "Monatsmittel",
     "legendMeanWeek": "Wochenmittel",
     "legendThin": "Weniger als 3 Messungen",
+    "legendGap": "Kurze Lücke ohne Messungen",
     "today": "Heute",
     "noDataYet": "Noch keine Daten",
     "layers": "Ebenen",
@@ -12446,8 +12447,8 @@
       "description": "Sobald es Einträge mit Datum gibt, erscheinen sie hier."
     },
     "values": {
-      "menuLabel": "Bis zu sechs Werte",
-      "none": "Keine Werte",
+      "menuTitle": "Werte unter den Spuren",
+      "trigger": "Werte ({count})",
       "noneInWindow": "Keine Werte in diesem Zeitraum",
       "series": {
         "BLOOD_PRESSURE_SYS": "Blutdruck sys.",
@@ -12470,7 +12471,7 @@
     },
     "selection": {
       "empty": "Keine Einträge in diesem Zeitraum",
-      "ongoing": "laufend",
+      "since": "seit {date}",
       "range": "{from} bis {to}",
       "mean": "Ø {values}",
       "week": "Woche vom {date}",
@@ -12481,8 +12482,8 @@
       "months": "Monate",
       "years": "Jahre",
       "groupingLabel": "Gruppierung",
-      "gap": "{from} bis {to} · keine Einträge",
-      "gapSingle": "{period} · keine Einträge",
+      "empty": "Keine Einträge von {from} bis {to}",
+      "emptySingle": "{period}: keine Einträge",
       "ended": "{label} vorbei",
       "afterDaysOne": "nach einem Tag",
       "afterDaysFew": "nach {count} Tagen",
@@ -12504,7 +12505,8 @@
       "to": "Bis",
       "label": "Gewählter Zeitraum",
       "open": "Zeitraum wählen",
-      "clear": "Alles zeigen"
+      "clear": "Alles zeigen",
+      "apply": "Übernehmen"
     },
     "item": {
       "labValuesOne": "1 Laborwert",
diff --git a/messages/en.json b/messages/en.json
index 5fdb46657..dc46d841f 100644
--- a/messages/en.json
+++ b/messages/en.json
@@ -12308,7 +12308,7 @@
     "title": "Timeline",
     "subtitle": "What happened when, beside your values.",
     "standing": "Ongoing",
-    "startMissing": "Start date missing",
+    "startUnknown": "start unknown",
     "openDay": "Open {date}",
     "zoom": {
       "all": "All",
@@ -12433,6 +12433,7 @@
     "legendMeanMonth": "Monthly mean",
     "legendMeanWeek": "Weekly mean",
     "legendThin": "Fewer than 3 readings",
+    "legendGap": "Short gap without measurements",
     "today": "Today",
     "noDataYet": "No data yet",
     "layers": "Layers",
@@ -12446,8 +12447,8 @@
       "description": "Dated entries appear here as soon as there are some."
     },
     "values": {
-      "menuLabel": "Up to six values",
-      "none": "No values",
+      "menuTitle": "Values under the lanes",
+      "trigger": "Values ({count})",
       "noneInWindow": "No values in this range",
       "series": {
         "BLOOD_PRESSURE_SYS": "Blood pressure sys.",
@@ -12470,7 +12471,7 @@
     },
     "selection": {
       "empty": "No entries in this period",
-      "ongoing": "ongoing",
+      "since": "since {date}",
       "range": "{from} to {to}",
       "mean": "Ø {values}",
       "week": "Week of {date}",
@@ -12481,8 +12482,8 @@
       "months": "Months",
       "years": "Years",
       "groupingLabel": "Grouping",
-      "gap": "{from} to {to} · no entries",
-      "gapSingle": "{period} · no entries",
+      "empty": "No entries from {from} to {to}",
+      "emptySingle": "No entries in {period}",
       "ended": "{label} ended",
       "afterDaysOne": "after 1 day",
       "afterDaysFew": "after {count} days",
@@ -12504,7 +12505,8 @@
       "to": "To",
       "label": "Chosen range",
       "open": "Choose a range",
-      "clear": "Show everything"
+      "clear": "Show everything",
+      "apply": "Apply"
     },
     "item": {
       "labValuesOne": "1 lab value",
diff --git a/messages/es.json b/messages/es.json
index 7e81bef2f..66674e350 100644
--- a/messages/es.json
+++ b/messages/es.json
@@ -12308,7 +12308,7 @@
     "title": "Cronología",
     "subtitle": "Qué pasó y cuándo, junto a tus valores.",
     "standing": "Permanente",
-    "startMissing": "Falta la fecha de inicio",
+    "startUnknown": "inicio desconocido",
     "openDay": "Abrir {date}",
     "zoom": {
       "all": "Todo",
@@ -12433,6 +12433,7 @@
     "legendMeanMonth": "Media mensual",
     "legendMeanWeek": "Media semanal",
     "legendThin": "Menos de 3 mediciones",
+    "legendGap": "Hueco corto sin mediciones",
     "today": "Hoy",
     "noDataYet": "Aún sin datos",
     "layers": "Capas",
@@ -12446,8 +12447,8 @@
       "description": "Las entradas con fecha aparecerán aquí en cuanto haya alguna."
     },
     "values": {
-      "menuLabel": "Hasta seis valores",
-      "none": "Sin valores",
+      "menuTitle": "Valores bajo los carriles",
+      "trigger": "Valores ({count})",
       "noneInWindow": "Sin valores en este periodo",
       "series": {
         "BLOOD_PRESSURE_SYS": "Presión sistólica",
@@ -12470,7 +12471,7 @@
     },
     "selection": {
       "empty": "No hay entradas en este periodo",
-      "ongoing": "en curso",
+      "since": "desde {date}",
       "range": "{from} a {to}",
       "mean": "Ø {values}",
       "week": "Semana del {date}",
@@ -12481,8 +12482,8 @@
       "months": "Meses",
       "years": "Años",
       "groupingLabel": "Agrupación",
-      "gap": "{from} a {to} · sin entradas",
-      "gapSingle": "{period} · sin entradas",
+      "empty": "Sin entradas de {from} a {to}",
+      "emptySingle": "Sin entradas en {period}",
       "ended": "Fin: {label}",
       "afterDaysOne": "después de 1 día",
       "afterDaysFew": "después de {count} días",
@@ -12504,7 +12505,8 @@
       "to": "Hasta",
       "label": "Periodo elegido",
       "open": "Elegir un periodo",
-      "clear": "Mostrar todo"
+      "clear": "Mostrar todo",
+      "apply": "Aplicar"
     },
     "item": {
       "labValuesOne": "1 valor de laboratorio",
diff --git a/messages/fr.json b/messages/fr.json
index 794dc9e41..e51f85778 100644
--- a/messages/fr.json
+++ b/messages/fr.json
@@ -12308,7 +12308,7 @@
     "title": "Chronologie",
     "subtitle": "Ce qui s’est passé et quand, à côté de vos valeurs.",
     "standing": "Permanent",
-    "startMissing": "Date de début manquante",
+    "startUnknown": "début inconnu",
     "openDay": "Ouvrir le {date}",
     "zoom": {
       "all": "Tout",
@@ -12433,6 +12433,7 @@
     "legendMeanMonth": "Moyenne mensuelle",
     "legendMeanWeek": "Moyenne hebdomadaire",
     "legendThin": "Moins de 3 mesures",
+    "legendGap": "Courte période sans mesures",
     "today": "Aujourd’hui",
     "noDataYet": "Pas encore de données",
     "layers": "Calques",
@@ -12446,8 +12447,8 @@
       "description": "Les entrées datées apparaîtront ici dès qu’il y en aura."
     },
     "values": {
-      "menuLabel": "Jusqu’à six valeurs",
-      "none": "Aucune valeur",
+      "menuTitle": "Valeurs sous les lignes",
+      "trigger": "Valeurs ({count})",
       "noneInWindow": "Aucune valeur sur cette période",
       "series": {
         "BLOOD_PRESSURE_SYS": "Tension systolique",
@@ -12470,7 +12471,7 @@
     },
     "selection": {
       "empty": "Aucune entrée sur cette période",
-      "ongoing": "en cours",
+      "since": "depuis le {date}",
       "range": "{from} au {to}",
       "mean": "Ø {values}",
       "week": "Semaine du {date}",
@@ -12481,8 +12482,8 @@
       "months": "Mois",
       "years": "Années",
       "groupingLabel": "Regroupement",
-      "gap": "{from} à {to} · aucune entrée",
-      "gapSingle": "{period} · aucune entrée",
+      "empty": "Aucune entrée de {from} à {to}",
+      "emptySingle": "Aucune entrée en {period}",
       "ended": "Fin : {label}",
       "afterDaysOne": "après 1 jour",
       "afterDaysFew": "après {count} jours",
@@ -12504,7 +12505,8 @@
       "to": "Au",
       "label": "Période choisie",
       "open": "Choisir une période",
-      "clear": "Tout afficher"
+      "clear": "Tout afficher",
+      "apply": "Appliquer"
     },
     "item": {
       "labValuesOne": "1 valeur de laboratoire",
diff --git a/messages/it.json b/messages/it.json
index dbb97e210..e67d78a3a 100644
--- a/messages/it.json
+++ b/messages/it.json
@@ -12308,7 +12308,7 @@
     "title": "Cronologia",
     "subtitle": "Cosa è successo e quando, accanto ai tuoi valori.",
     "standing": "Permanente",
-    "startMissing": "Data di inizio mancante",
+    "startUnknown": "inizio sconosciuto",
     "openDay": "Apri {date}",
     "zoom": {
       "all": "Tutto",
@@ -12433,6 +12433,7 @@
     "legendMeanMonth": "Media mensile",
     "legendMeanWeek": "Media settimanale",
     "legendThin": "Meno di 3 misurazioni",
+    "legendGap": "Breve pausa senza misurazioni",
     "today": "Oggi",
     "noDataYet": "Ancora nessun dato",
     "layers": "Livelli",
@@ -12446,8 +12447,8 @@
       "description": "Le voci con data compariranno qui appena ce ne saranno."
     },
     "values": {
-      "menuLabel": "Fino a sei valori",
-      "none": "Nessun valore",
+      "menuTitle": "Valori sotto le corsie",
+      "trigger": "Valori ({count})",
       "noneInWindow": "Nessun valore in questo periodo",
       "series": {
         "BLOOD_PRESSURE_SYS": "Pressione sistolica",
@@ -12470,7 +12471,7 @@
     },
     "selection": {
       "empty": "Nessuna voce in questo periodo",
-      "ongoing": "in corso",
+      "since": "dal {date}",
       "range": "dal {from} al {to}",
       "mean": "Ø {values}",
       "week": "Settimana del {date}",
@@ -12481,8 +12482,8 @@
       "months": "Mesi",
       "years": "Anni",
       "groupingLabel": "Raggruppamento",
-      "gap": "Da {from} a {to} · nessuna voce",
-      "gapSingle": "{period} · nessuna voce",
+      "empty": "Nessuna voce da {from} a {to}",
+      "emptySingle": "{period}: nessuna voce",
       "ended": "Fine: {label}",
       "afterDaysOne": "dopo 1 giorno",
       "afterDaysFew": "dopo {count} giorni",
@@ -12504,7 +12505,8 @@
       "to": "Al",
       "label": "Periodo scelto",
       "open": "Scegli un periodo",
-      "clear": "Mostra tutto"
+      "clear": "Mostra tutto",
+      "apply": "Applica"
     },
     "item": {
       "labValuesOne": "1 valore di laboratorio",
diff --git a/messages/ko.json b/messages/ko.json
index ba4dfd53d..cc0b5beb8 100644
--- a/messages/ko.json
+++ b/messages/ko.json
@@ -12308,7 +12308,7 @@
     "title": "타임라인",
     "subtitle": "언제 무엇이 있었는지, 내 수치와 나란히.",
     "standing": "지속",
-    "startMissing": "시작일 없음",
+    "startUnknown": "시작일 미상",
     "openDay": "{date} 열기",
     "zoom": {
       "all": "전체",
@@ -12433,6 +12433,7 @@
     "legendMeanMonth": "월평균",
     "legendMeanWeek": "주간 평균",
     "legendThin": "측정 3회 미만",
+    "legendGap": "측정 없는 짧은 공백",
     "today": "오늘",
     "noDataYet": "아직 데이터 없음",
     "layers": "레이어",
@@ -12446,8 +12447,8 @@
       "description": "날짜가 있는 기록이 생기면 여기에 나타나요."
     },
     "values": {
-      "menuLabel": "최대 여섯 가지 수치",
-      "none": "수치 없음",
+      "menuTitle": "레인 아래 수치",
+      "trigger": "수치 ({count})",
       "noneInWindow": "이 기간에 수치 없음",
       "series": {
         "BLOOD_PRESSURE_SYS": "수축기 혈압",
@@ -12470,7 +12471,7 @@
     },
     "selection": {
       "empty": "이 기간에는 항목이 없습니다",
-      "ongoing": "진행 중",
+      "since": "{date}부터",
       "range": "{from}~{to}",
       "mean": "Ø {values}",
       "week": "{date} 주",
@@ -12481,8 +12482,8 @@
       "months": "월",
       "years": "연도",
       "groupingLabel": "묶기",
-      "gap": "{from}~{to} · 기록 없음",
-      "gapSingle": "{period} · 기록 없음",
+      "empty": "{from}~{to} 기록 없음",
+      "emptySingle": "{period} 기록 없음",
       "ended": "{label} 끝남",
       "afterDaysOne": "{count}일 후",
       "afterDaysFew": "{count}일 후",
@@ -12504,7 +12505,8 @@
       "to": "종료",
       "label": "선택한 기간",
       "open": "기간 선택",
-      "clear": "전체 보기"
+      "clear": "전체 보기",
+      "apply": "적용"
     },
     "item": {
       "labValuesOne": "검사 수치 {count}개",
diff --git a/messages/pl.json b/messages/pl.json
index 5c28ab6a8..80ba6f34d 100644
--- a/messages/pl.json
+++ b/messages/pl.json
@@ -12308,7 +12308,7 @@
     "title": "Oś czasu",
     "subtitle": "Co i kiedy się działo, obok Twoich wartości.",
     "standing": "Stałe",
-    "startMissing": "Brak daty rozpoczęcia",
+    "startUnknown": "początek nieznany",
     "openDay": "Otwórz {date}",
     "zoom": {
       "all": "Wszystko",
@@ -12433,6 +12433,7 @@
     "legendMeanMonth": "Średnia miesięczna",
     "legendMeanWeek": "Średnia tygodniowa",
     "legendThin": "Mniej niż 3 pomiary",
+    "legendGap": "Krótka przerwa bez pomiarów",
     "today": "Dziś",
     "noDataYet": "Jeszcze brak danych",
     "layers": "Warstwy",
@@ -12446,8 +12447,8 @@
       "description": "Wpisy z datą pojawią się tutaj, gdy tylko jakieś będą."
     },
     "values": {
-      "menuLabel": "Do sześciu wartości",
-      "none": "Brak wartości",
+      "menuTitle": "Wartości pod ścieżkami",
+      "trigger": "Wartości ({count})",
       "noneInWindow": "Brak wartości w tym okresie",
       "series": {
         "BLOOD_PRESSURE_SYS": "Ciśnienie skurczowe",
@@ -12470,7 +12471,7 @@
     },
     "selection": {
       "empty": "Brak wpisów w tym okresie",
-      "ongoing": "trwa",
+      "since": "od {date}",
       "range": "od {from} do {to}",
       "mean": "Ø {values}",
       "week": "Tydzień od {date}",
@@ -12481,8 +12482,8 @@
       "months": "Miesiące",
       "years": "Lata",
       "groupingLabel": "Grupowanie",
-      "gap": "Od {from} do {to} · brak wpisów",
-      "gapSingle": "{period} · brak wpisów",
+      "empty": "Brak wpisów od {from} do {to}",
+      "emptySingle": "Brak wpisów: {period}",
       "ended": "Koniec: {label}",
       "afterDaysOne": "po 1 dniu",
       "afterDaysFew": "po {count} dniach",
@@ -12504,7 +12505,8 @@
       "to": "Do",
       "label": "Wybrany zakres",
       "open": "Wybierz zakres",
-      "clear": "Pokaż wszystko"
+      "clear": "Pokaż wszystko",
+      "apply": "Zastosuj"
     },
     "item": {
       "labValuesOne": "1 wynik badania",
diff --git a/src/app/api/timeline/route.ts b/src/app/api/timeline/route.ts
index a14be92d3..6180427b2 100644
--- a/src/app/api/timeline/route.ts
+++ b/src/app/api/timeline/route.ts
@@ -45,7 +45,7 @@ export const GET = apiHandler(async (request: Request) => {
   }
   const seriesKeys = parseSeriesKeys(parsed.data.values);
   if (seriesKeys === null) {
-    return apiError("Unknown value series, or more than six", 422, {
+    return apiError("Unknown value series", 422, {
       errorCode: "timeline.invalid",
     });
   }
diff --git a/src/components/timeline/__tests__/chronicle-model.test.ts b/src/components/timeline/__tests__/chronicle-model.test.ts
index 37633251b..7ec6c0329 100644
--- a/src/components/timeline/__tests__/chronicle-model.test.ts
+++ b/src/components/timeline/__tests__/chronicle-model.test.ts
@@ -48,6 +48,7 @@ describe("chronicleEntries", () => {
       label: "x",
       sub: null,
       href: null,
+      group: null,
     });
     expect(chronicleEntries(tl, TODAY).some((e) => e.date > TODAY)).toBe(false);
   });
diff --git a/src/components/timeline/__tests__/medication-rows.test.ts b/src/components/timeline/__tests__/medication-rows.test.ts
new file mode 100644
index 000000000..0507e2bac
--- /dev/null
+++ b/src/components/timeline/__tests__/medication-rows.test.ts
@@ -0,0 +1,233 @@
+/**
+ * v1.42 (#613) — one medication is one thing. The server sends a medication
+ * as up to four kinds of item (its own span, its courses, its dose changes,
+ * its pauses), all tagged with the medication's id as `group`. Drawn item by
+ * item, "Mounjaro 7.5 mg" and "Mounjaro" were two bars on two rows for one
+ * medication. These pin the grouping every surface reads through.
+ */
+import { describe, expect, it } from "vitest";
+
+import type { TimelineItem } from "@/lib/day/contract";
+
+import {
+  doseAt,
+  doseSegments,
+  medicationGroups,
+  medicationListItems,
+  medicationPeriodItem,
+  strayDoses,
+} from "../medication-rows";
+import { item } from "./timeline-fixture";
+
+const TODAY = "2025-12-31";
+
+/** A GLP-1 medication with a course, three doses and a pause. */
+function mounjaro(): TimelineItem[] {
+  return [
+    item({
+      id: "mj",
+      group: "mj",
+      kind: "medication",
+      start: "2025-01-06",
+      open: true,
+      label: "Mounjaro",
+      sub: "7.5 mg",
+    }),
+    item({
+      id: "mj-course",
+      group: "mj",
+      kind: "course",
+      start: "2025-01-06",
+      open: true,
+      label: "Mounjaro",
+    }),
+    item({
+      id: "mj-25",
+      group: "mj",
+      kind: "doseChange",
+      start: "2025-01-06",
+      label: "Mounjaro",
+      sub: "2.5 mg",
+    }),
+    item({
+      id: "mj-5",
+      group: "mj",
+      kind: "doseChange",
+      start: "2025-03-03",
+      label: "Mounjaro",
+      sub: "5 mg",
+    }),
+    item({
+      id: "mj-75",
+      group: "mj",
+      kind: "doseChange",
+      start: "2025-06-02",
+      label: "Mounjaro",
+      sub: "7.5 mg",
+    }),
+    item({
+      id: "mj-pause",
+      group: "mj",
+      kind: "pause",
+      start: "2025-08-01",
+      end: "2025-08-20",
+      label: "Mounjaro",
+    }),
+  ];
+}
+
+/** A standing medication without courses and with one dose change. */
+function ramipril(): TimelineItem[] {
+  return [
+    item({
+      id: "rp",
+      group: "rp",
+      kind: "medication",
+      start: "2024-02-01",
+      open: true,
+      label: "Ramipril",
+      sub: "5 mg",
+    }),
+    item({
+      id: "rp-5",
+      group: "rp",
+      kind: "doseChange",
+      start: "2025-04-14",
+      label: "Ramipril",
+      sub: "5 mg",
+    }),
+  ];
+}
+
+describe("medicationGroups", () => {
+  it("makes one group per medication, however many items it arrives as", () => {
+    const groups = medicationGroups([...ramipril(), ...mounjaro()]);
+    expect(groups.map((g) => [g.key, g.label])).toEqual([
+      ["rp", "Ramipril"],
+      ["mj", "Mounjaro"],
+    ]);
+    const mj = groups[1];
+    // The course is the stretch it was taken; its own span is not drawn
+    // beside it.
+    expect(mj.periods.map((p) => p.id)).toEqual(["mj-course"]);
+    expect(mj.doses.map((d) => d.id)).toEqual(["mj-25", "mj-5", "mj-75"]);
+    expect(mj.pauses.map((p) => p.id)).toEqual(["mj-pause"]);
+    // Without a course, the medication's own span is the stretch.
+    expect(groups[0].periods.map((p) => p.id)).toEqual(["rp"]);
+  });
+
+  it("keeps an item without a group on its own", () => {
+    const groups = medicationGroups([
+      item({ id: "a", kind: "course", start: "2025-01-01", end: "2025-02-01" }),
+      item({ id: "b", kind: "course", start: "2025-03-01", end: "2025-04-01" }),
+    ]);
+    expect(groups.map((g) => g.key)).toEqual(["a", "b"]);
+  });
+});
+
+describe("dose segments", () => {
+  it("cuts a stretch at each dose change and names each piece's dose", () => {
+    const [mj] = medicationGroups(mounjaro());
+    const pieces = doseSegments(mj, mj.periods[0]);
+    expect(
+      pieces.map(({ start, end, dose }) => ({ start, end, dose })),
+    ).toEqual([
+      { start: "2025-01-06", end: "2025-03-02", dose: "2.5 mg" },
+      { start: "2025-03-03", end: "2025-06-01", dose: "5 mg" },
+      { start: "2025-06-02", end: null, dose: "7.5 mg" },
+    ]);
+    expect(pieces.map((p) => [p.first, p.last])).toEqual([
+      [true, false],
+      [false, false],
+      [false, true],
+    ]);
+  });
+
+  it("leaves the dose before the first recorded change unnamed", () => {
+    const [rp] = medicationGroups(ramipril());
+    expect(doseSegments(rp, rp.periods[0]).map((p) => p.dose)).toEqual([
+      null,
+      "5 mg",
+    ]);
+    expect(doseAt(rp, "2024-06-01")).toBeNull();
+    // With no dose change at all, the medication's own dose.
+    const [plain] = medicationGroups([ramipril()[0]]);
+    expect(doseAt(plain, "2024-06-01")).toBe("5 mg");
+  });
+
+  it("keeps a dose change outside every stretch as a mark of its own", () => {
+    const items = [
+      item({
+        id: "c1",
+        group: "vd",
+        kind: "course",
+        start: "2024-11-01",
+        end: "2025-03-31",
+        label: "Vitamin D",
+      }),
+      item({
+        id: "vd-dose",
+        group: "vd",
+        kind: "doseChange",
+        start: "2025-06-01",
+        label: "Vitamin D",
+        sub: "1000 IE",
+      }),
+    ];
+    const [vd] = medicationGroups(items);
+    expect(strayDoses(vd).map((d) => d.id)).toEqual(["vd-dose"]);
+  });
+});
+
+describe("medicationListItems", () => {
+  it("lists a start once, with the dose taken then, and folds a dose change on that day", () => {
+    const listed = medicationListItems(mounjaro());
+    expect(listed.map((i) => [i.id, i.kind, i.sub])).toEqual([
+      ["mj-course", "course", "2.5 mg"],
+      ["mj-5", "doseChange", "5 mg"],
+      ["mj-75", "doseChange", "7.5 mg"],
+      ["mj-pause", "pause", null],
+    ]);
+  });
+});
+
+describe("medicationPeriodItem", () => {
+  const [mj] = medicationGroups(mounjaro());
+
+  it("names a dose change in the period with the new dose, from its day", () => {
+    expect(
+      medicationPeriodItem(mj, "2025-03-01", "2025-03-31", TODAY),
+    ).toMatchObject({
+      id: "mj",
+      kind: "medication",
+      label: "Mounjaro",
+      sub: "5 mg",
+      start: "2025-03-03",
+      open: true,
+    });
+  });
+
+  it("names a pause in the period as a pause", () => {
+    expect(
+      medicationPeriodItem(mj, "2025-08-01", "2025-08-31", TODAY),
+    ).toMatchObject({
+      id: "mj",
+      kind: "pause",
+      label: "Mounjaro",
+      start: "2025-08-01",
+      end: "2025-08-20",
+    });
+  });
+
+  it("leaves out a month where nothing happens to a running medication", () => {
+    expect(
+      medicationPeriodItem(mj, "2025-10-01", "2025-10-31", TODAY),
+    ).toBeNull();
+  });
+
+  it("names the start month once, with the first dose", () => {
+    expect(
+      medicationPeriodItem(mj, "2025-01-01", "2025-01-31", TODAY),
+    ).toMatchObject({ sub: "2.5 mg", start: "2025-01-06" });
+  });
+});
diff --git a/src/components/timeline/__tests__/no-raw-code-guard.test.tsx b/src/components/timeline/__tests__/no-raw-code-guard.test.tsx
index 044296ea7..daa7dfbfc 100644
--- a/src/components/timeline/__tests__/no-raw-code-guard.test.tsx
+++ b/src/components/timeline/__tests__/no-raw-code-guard.test.tsx
@@ -12,6 +12,10 @@
  * running items and its events) and asserts that the visible text holds no
  * upper-case code and no sentinel. A new kind or a new code that is not
  * worded fails here instead of on a screenshot.
+ *
+ * The timeline's surfaces also hold no middle dot: an entry's parts stand
+ * apart by a space, a comma or a line of their own, never by "·" (the beta
+ * read "Ramipril resumed · after 11 days" as one run-on line).
  */
 import { describe, expect, it } from "vitest";
 import { renderToStaticMarkup } from "react-dom/server";
@@ -88,6 +92,9 @@ function WithFormat({
   return <>{build(useSeriesValueFormat())}</>;
 }
 
+/** The separator glyph the timeline no longer joins anything with. */
+const MIDDLE_DOT = "\u00b7";
+
 /** Every day of September 2026, one per item, so one month holds them all. */
 let nextDay = 1;
 const day = () => `2026-09-${String(nextDay++).padStart(2, "0")}`;
@@ -174,6 +181,7 @@ function everyKind(): TimelineResponse {
         items: [
           item({
             id: "med",
+            group: "med",
             kind: "medication",
             start: "2026-09-01",
             open: true,
@@ -182,6 +190,7 @@ function everyKind(): TimelineResponse {
           }),
           item({
             id: "course",
+            group: "vit-d",
             kind: "course",
             start: "2026-09-05",
             end: "2026-09-25",
@@ -189,6 +198,7 @@ function everyKind(): TimelineResponse {
           }),
           item({
             id: "dose",
+            group: "med",
             kind: "doseChange",
             start: "2026-09-10",
             label: "Ramipril",
@@ -196,6 +206,7 @@ function everyKind(): TimelineResponse {
           }),
           item({
             id: "pause",
+            group: "med",
             kind: "pause",
             start: "2026-09-14",
             end: "2026-09-24",
@@ -243,6 +254,7 @@ function everyKind(): TimelineResponse {
     ],
     standing: [],
     series: [],
+    availableSeries: [],
     notable: [],
   };
   // The fixture itself must reach every kind, or the guard proves less.
@@ -278,6 +290,7 @@ describe.each<Locale>(["de", "en"])("the timeline in %s", (locale) => {
       ),
     );
     expect(rawCodes(text)).toEqual([]);
+    expect(text).not.toContain(MIDDLE_DOT);
   });
 
   it("words every code in the selection bar", () => {
@@ -301,6 +314,7 @@ describe.each<Locale>(["de", "en"])("the timeline in %s", (locale) => {
     );
     expect(text).toContain(locale === "de" ? "5 Laborwerte" : "5 lab values");
     expect(rawCodes(text)).toEqual([]);
+    expect(text).not.toContain(MIDDLE_DOT);
   });
 
   it("words every code in the screen-reader table", () => {
@@ -326,6 +340,7 @@ describe.each<Locale>(["de", "en"])("the timeline in %s", (locale) => {
     );
     const table = html.slice(html.indexOf('data-slot="timeline-table"'));
     expect(rawCodes(textOf(table))).toEqual([]);
+    expect(textOf(html)).not.toContain(MIDDLE_DOT);
   });
 
   it("words every code in the lane labels and their hover titles", () => {
@@ -342,6 +357,7 @@ describe.each<Locale>(["de", "en"])("the timeline in %s", (locale) => {
     const labels = layout.lanes.flatMap((l) => l.labels.map((x) => x.text));
     expect(labels.length).toBeGreaterThan(10);
     expect(rawCodes(labels.join("\n"))).toEqual([]);
+    expect(labels.join("\n")).not.toContain(MIDDLE_DOT);
 
     const titles = textOf(
       render(
@@ -375,6 +391,7 @@ describe.each<Locale>(["de", "en"])("the timeline in %s", (locale) => {
     expect(rawCodes(titles.replace(/timeline\.selection\.\w+/g, ""))).toEqual(
       [],
     );
+    expect(titles).not.toContain(MIDDLE_DOT);
   });
 });
 
diff --git a/src/components/timeline/__tests__/series-colors.test.ts b/src/components/timeline/__tests__/series-colors.test.ts
index d14355803..980dd976c 100644
--- a/src/components/timeline/__tests__/series-colors.test.ts
+++ b/src/components/timeline/__tests__/series-colors.test.ts
@@ -1,7 +1,6 @@
 import { describe, expect, it } from "vitest";
 
 import {
-  SERIES_FALLBACK_COLOR,
   SERIES_PALETTE,
   assignSeriesColors,
   preferredSeriesColor,
@@ -10,7 +9,8 @@ import { VALUE_OPTIONS } from "../timeline-view";
 
 /**
  * A value line takes the colour its type carries in the measurement list,
- * and no two chosen lines ever share one.
+ * no two of the first five chosen lines share one, and from the sixth on
+ * the five data tokens repeat in palette order.
  */
 describe("assignSeriesColors", () => {
   it("gives a type on its own the colour it has in the list", () => {
@@ -26,18 +26,18 @@ describe("assignSeriesColors", () => {
     }
   });
 
-  it("only ever hands out data tokens, and the foreground once they run out", () => {
+  it("only ever hands out data tokens", () => {
     for (const key of VALUE_OPTIONS) {
       const own = preferredSeriesColor(key);
       if (own) expect(SERIES_PALETTE).toContain(own);
     }
   });
 
-  it("never repeats a colour among six chosen lines", () => {
-    // Every six-line choice from the selector's options.
+  it("never repeats a colour among five chosen lines", () => {
+    // Every five-line choice from the selector's options.
     const options = [...VALUE_OPTIONS];
     const pick = (from: number, chosen: string[]): string[][] =>
-      chosen.length === 6
+      chosen.length === 5
         ? [chosen]
         : options
             .slice(from)
@@ -46,11 +46,28 @@ describe("assignSeriesColors", () => {
     expect(choices.length).toBeGreaterThan(100);
     for (const keys of choices) {
       const colours = assignSeriesColors(keys, VALUE_OPTIONS);
-      expect(colours.size).toBe(6);
-      expect(new Set(colours.values()).size).toBe(6);
-      for (const colour of colours.values()) {
-        expect([...SERIES_PALETTE, SERIES_FALLBACK_COLOR]).toContain(colour);
-      }
+      expect(colours.size).toBe(5);
+      expect(new Set(colours.values()).size).toBe(5);
+    }
+  });
+
+  it("repeats the five data tokens in order past the fifth line, never the foreground", () => {
+    const keys = [
+      ...VALUE_OPTIONS,
+      "BODY_TEMPERATURE",
+      "VO2_MAX",
+      "OXYGEN_SATURATION",
+      "RESPIRATORY_RATE",
+    ];
+    expect(keys.length).toBe(15);
+    const colours = assignSeriesColors(keys, keys);
+    expect(colours.size).toBe(15);
+    const used = [...colours.values()];
+    for (const colour of used) expect(SERIES_PALETTE).toContain(colour);
+    // Every token is used before any is used again, and none more than
+    // three times across fifteen lines.
+    for (const token of SERIES_PALETTE) {
+      expect(used.filter((c) => c === token).length).toBe(3);
     }
   });
 
diff --git a/src/components/timeline/__tests__/timeline-components.test.tsx b/src/components/timeline/__tests__/timeline-components.test.tsx
index 43cdcfab9..df366d3c8 100644
--- a/src/components/timeline/__tests__/timeline-components.test.tsx
+++ b/src/components/timeline/__tests__/timeline-components.test.tsx
@@ -156,7 +156,7 @@ describe("chronicle", () => {
         )}
       />,
     );
-    expect(html).toContain("April bis Oktober 2026 · keine Einträge");
+    expect(html).toContain("Keine Einträge von April bis Oktober 2026");
     expect(html).toContain("Dauerhaft");
     expect(html).toContain("2 Allergien");
     expect(html).toContain("Erkältung vorbei");
@@ -209,7 +209,7 @@ describe("chronicle", () => {
         )}
       />,
     );
-    expect(text(html)).toContain("129/82 mmHg · 82,6 kg");
+    expect(text(html)).toContain("129/82 mmHg, 82,6 kg");
   });
 
   it("names a quarter once, at its newest month, with its span", () => {
@@ -275,8 +275,11 @@ describe("selection bar", () => {
   it("lists the month's entries and offers the selected day", () => {
     const html = bar("2026-01-03");
     expect(html).toContain("Januar 2026");
-    expect(html).toContain("Erkältung · 31. Dez. bis 8. Jan.");
-    expect(html).toContain("Vitamin D (Winter) · laufend");
+    expect(html).toContain("Erkältung, 31. Dez. bis 8. Jan.");
+    // A closed course that runs through the month reads its own days; no
+    // "ongoing" word stands for them.
+    expect(html).toContain("Vitamin D (Winter), 1. Nov. bis 31. März");
+    expect(html).not.toContain("laufend");
     expect(html).not.toContain("Bluthochdruck");
     expect(html).toContain("3. Jan. öffnen");
     expect(html).toContain('data-date="2026-01-03"');
@@ -284,22 +287,22 @@ describe("selection bar", () => {
 
   it("names a pause as a pause", () => {
     const html = text(bar("2021-06-05"));
-    expect(html).toContain("Ramipril pausiert · 1. Juni bis 11. Juni");
+    expect(html).toContain("Ramipril pausiert, 1. Juni bis 11. Juni");
   });
 
   it("names the bucket's means with the readings behind each", () => {
     expect(text(bar("2026-01-03"))).toContain(
-      "Ø Blutdruck 129/82 mmHg (Schnitt aus 4 Messungen) · Gewicht 82,6 kg (Schnitt aus 3 Messungen)",
+      "Ø Blutdruck 129/82 mmHg (Schnitt aus 4 Messungen), Gewicht 82,6 kg (Schnitt aus 3 Messungen)",
     );
     expect(text(bar("2026-07-15"))).toContain(
-      "Ø Blutdruck sys. 131 mmHg (1 Messung) · Blutdruck dia. kein Wert · Gewicht kein Wert",
+      "Ø Blutdruck sys. 131 mmHg (1 Messung), Blutdruck dia. kein Wert, Gewicht kein Wert",
     );
   });
 
   it("says a missing month has no value instead of interpolating one", () => {
     const html = bar("2026-02-10");
     expect(text(html)).toContain(
-      "Ø Blutdruck sys. kein Wert · Blutdruck dia. kein Wert · Gewicht kein Wert",
+      "Ø Blutdruck sys. kein Wert, Blutdruck dia. kein Wert, Gewicht kein Wert",
     );
     // January's 129 and March's 133 would make 131 between them.
     expect(html).not.toMatch(/\d mmHg/);
@@ -361,7 +364,7 @@ describe("selection bar head and hint", () => {
     expect(html).toContain('data-period-from="2026-01-01"');
     expect(html).toContain('data-period-to="2026-03-31"');
     expect(text(html)).toContain("Januar bis März 2026");
-    expect(text(html)).toContain("Erkältung · 31. Dez. bis 8. Jan.");
+    expect(text(html)).toContain("Erkältung, 31. Dez. bis 8. Jan.");
   });
 
   it("calls a bucket empty only when it holds neither an entry nor a value", () => {
@@ -481,11 +484,14 @@ describe("value line colours", () => {
     );
     for (const key of ["BLOOD_PRESSURE_SYS", "WEIGHT"]) {
       const part = html.slice(html.indexOf(`data-series="${key}"`));
-      expect(part.slice(0, part.indexOf("</span>"))).toContain(
+      const dot = part.slice(part.indexOf('data-slot="timeline-series-dot"'));
+      expect(dot.slice(0, dot.indexOf(">"))).toContain(
         `style="background:${seriesColor(key)}"`,
       );
     }
-    expect(text(html)).toBe("129/82 mmHg · 82,6 kg");
+    // Apart by space on screen, a comma for a screen reader; never a dot.
+    expect(text(html)).toBe("129/82 mmHg, 82,6 kg");
+    expect(html).toContain('class="sr-only">, </span>');
   });
 });
 
diff --git a/src/components/timeline/__tests__/timeline-fixture.ts b/src/components/timeline/__tests__/timeline-fixture.ts
index 3a346ef28..79bf546b1 100644
--- a/src/components/timeline/__tests__/timeline-fixture.ts
+++ b/src/components/timeline/__tests__/timeline-fixture.ts
@@ -1,7 +1,7 @@
 /**
  * A made-up record for the timeline tests: a chronic condition and several
- * episodes, two allergies, a standing medication with a dose change, a winter
- * course three years running, a medication whose start is unknown, visits
+ * episodes, two allergies, a standing medication with a dose change and a
+ * pause, a winter course three years running (one medication, one row), a medication whose start is unknown, visits
  * with two procedures, documents, vaccinations and three life events. All
  * data invented.
  */
@@ -35,6 +35,7 @@ export function item(
     label: over.id,
     sub: null,
     href: null,
+    group: null,
     ...over,
   };
 }
@@ -142,6 +143,7 @@ export function fullTimeline(): TimelineResponse {
         items: [
           item({
             id: "med-1",
+            group: "med-1",
             kind: "medication",
             start: "2019-04-02",
             open: true,
@@ -150,6 +152,7 @@ export function fullTimeline(): TimelineResponse {
           }),
           item({
             id: "dose-1",
+            group: "med-1",
             kind: "doseChange",
             start: "2020-08-12",
             label: "Ramipril",
@@ -157,6 +160,7 @@ export function fullTimeline(): TimelineResponse {
           }),
           item({
             id: "med-2",
+            group: "med-2",
             kind: "medication",
             start: "2022-11-03",
             end: "2022-12-10",
@@ -164,6 +168,7 @@ export function fullTimeline(): TimelineResponse {
           }),
           item({
             id: "course-1",
+            group: "vit-d",
             kind: "course",
             start: "2023-11-01",
             end: "2024-03-31",
@@ -171,6 +176,7 @@ export function fullTimeline(): TimelineResponse {
           }),
           item({
             id: "course-2",
+            group: "vit-d",
             kind: "course",
             start: "2024-11-01",
             end: "2025-03-31",
@@ -178,6 +184,7 @@ export function fullTimeline(): TimelineResponse {
           }),
           item({
             id: "course-3",
+            group: "vit-d",
             kind: "course",
             start: "2025-11-01",
             end: "2026-03-31",
@@ -185,6 +192,7 @@ export function fullTimeline(): TimelineResponse {
           }),
           item({
             id: "pause-1",
+            group: "med-1",
             kind: "pause",
             start: "2021-06-01",
             end: "2021-06-11",
@@ -275,6 +283,7 @@ export function fullTimeline(): TimelineResponse {
         points: [{ t: "2026-01-01", mean: 82.6, count: 3 }],
       },
     ],
+    availableSeries: ["BLOOD_PRESSURE_SYS", "BLOOD_PRESSURE_DIA", "WEIGHT"],
     notable: [{ date: "2026-01-04", kind: "extremeHigh" }],
   };
 }
diff --git a/src/components/timeline/__tests__/timeline-geometry.test.ts b/src/components/timeline/__tests__/timeline-geometry.test.ts
index 017872cd6..8b9fe4e26 100644
--- a/src/components/timeline/__tests__/timeline-geometry.test.ts
+++ b/src/components/timeline/__tests__/timeline-geometry.test.ts
@@ -198,16 +198,156 @@ describe("layoutLane", () => {
     expect(layout.rows).toBe(2);
   });
 
-  it("lays a dose change and a pause over the medication they belong to", () => {
+  it("draws one row per medication: its dose changes cut the bar, its pause is a gap in it", () => {
     const lane = fullTimeline().lanes.find((l) => l.key === "medications")!;
     const layout = layoutLane({ lane, top: 0 }, window, scale, opts);
-    const host = layout.spans.find((s) => s.item.id === "med-1")!;
-    expect(layout.points.find((p) => p.item.id === "dose-1")?.row).toBe(
-      host.row,
+    // Ramipril, Ibuprofen and the winter Vitamin D: three medications,
+    // three rows, though the lane holds seven items.
+    expect(layout.rows).toBe(3);
+    const rowOf = (id: string) =>
+      new Set(
+        [...layout.spans, ...layout.points]
+          .filter((m) => m.item.id === id)
+          .map((m) => m.row),
+      );
+    // Ramipril's bar is cut at its dose change into two pieces, each
+    // carrying its own dose, on one row with its pause.
+    const ramipril = layout.spans.filter(
+      (s) => s.item.id === "med-1" && !s.pause,
     );
+    expect(ramipril.map((s) => s.segment?.dose)).toEqual([null, "5 mg"]);
+    expect(ramipril.map((s) => s.segment?.change?.id ?? null)).toEqual([
+      null,
+      "dose-1",
+    ]);
+    expect(ramipril[0].xEnd).toBeLessThan(ramipril[1].xStart);
     const pause = layout.spans.find((s) => s.item.id === "pause-1")!;
     expect(pause.pause).toBe(true);
-    expect(pause.row).toBe(host.row);
+    expect([...rowOf("med-1")]).toEqual([pause.row]);
+    // The dose change is no mark of its own any more: it is the cut.
+    expect(layout.points.some((p) => p.item.id === "dose-1")).toBe(false);
+    // Three winter courses of one medication share one row.
+    const vitamin = new Set([
+      ...rowOf("course-1"),
+      ...rowOf("course-2"),
+      ...rowOf("course-3"),
+    ]);
+    expect(vitamin.size).toBe(1);
+    expect(vitamin.has(pause.row)).toBe(false);
+  });
+
+  it("names the dose of a piece that runs into the window, set by a change before it", () => {
+    const lane = fullTimeline().lanes.find((l) => l.key === "medications")!;
+    const year = { from: "2024-01-01", to: "2024-12-31" };
+    const layout = layoutLane(
+      { lane, top: 0 },
+      year,
+      createScale(year, 164, 1200),
+      opts,
+    );
+    // Ramipril's first piece ended in 2020 and is not drawn; the piece in
+    // the window carries the dose of the 2020 change, outside the window.
+    const ramipril = layout.spans.filter(
+      (s) => s.item.id === "med-1" && !s.pause,
+    );
+    expect(ramipril.map((s) => s.segment?.dose)).toEqual(["5 mg"]);
+    expect(ramipril[0].clippedLeft).toBe(true);
+    expect(layout.labels.map((l) => l.text)).toContain("Ramipril 5 mg");
+    // Ibuprofen (2022) has nothing in 2024: no row for it.
+    expect(layout.spans.some((s) => s.item.id === "med-2")).toBe(false);
+    expect(layout.rows).toBe(2);
+    // The 2021 pause lies outside the window and is not drawn at its edge.
+    expect(layout.spans.some((s) => s.item.id === "pause-1")).toBe(false);
+  });
+
+  it("does not draw a medication twice when it has a course", () => {
+    // One medication sent as its own span, a course and two dose changes:
+    // the Mounjaro case, once two bars on two rows.
+    const items = [
+      item({
+        id: "mj",
+        group: "mj",
+        kind: "medication",
+        start: "2025-01-06",
+        open: true,
+        label: "Mounjaro",
+        sub: "7,5 mg",
+      }),
+      item({
+        id: "mj-course",
+        group: "mj",
+        kind: "course",
+        start: "2025-01-06",
+        open: true,
+        label: "Mounjaro",
+      }),
+      item({
+        id: "mj-25",
+        group: "mj",
+        kind: "doseChange",
+        start: "2025-01-06",
+        label: "Mounjaro",
+        sub: "2,5 mg",
+      }),
+      item({
+        id: "mj-5",
+        group: "mj",
+        kind: "doseChange",
+        start: "2025-03-03",
+        label: "Mounjaro",
+        sub: "5 mg",
+      }),
+      item({
+        id: "mj-75",
+        group: "mj",
+        kind: "doseChange",
+        start: "2025-06-02",
+        label: "Mounjaro",
+        sub: "7,5 mg",
+      }),
+      item({
+        id: "mj-pause",
+        group: "mj",
+        kind: "pause",
+        start: "2025-08-01",
+        end: "2025-08-20",
+        label: "Mounjaro",
+      }),
+    ];
+    const wide = createScale(
+      { from: "2025-01-01", to: "2025-12-31" },
+      164,
+      1400,
+    );
+    const layout = layoutLane(
+      { lane: { key: "medications", items }, top: 0 },
+      { from: "2025-01-01", to: "2025-12-31" },
+      wide,
+      { ...opts, today: "2025-12-31" },
+    );
+    expect(layout.rows).toBe(1);
+    const pieces = layout.spans.filter((s) => !s.pause);
+    expect(pieces.every((s) => s.item.id === "mj-course")).toBe(true);
+    expect(pieces.map((s) => s.segment?.dose)).toEqual([
+      "2,5 mg",
+      "5 mg",
+      "7,5 mg",
+    ]);
+    // Only the last piece runs on; only the first could carry a lead-in.
+    expect(pieces.map((s) => s.segment?.last)).toEqual([false, false, true]);
+    expect(pieces.map((s) => s.segment?.first)).toEqual([true, false, false]);
+    // The name stands once, with the first dose; the later doses above
+    // where they begin.
+    expect(layout.labels.map((l) => l.text)).toEqual([
+      "Mounjaro 2,5 mg",
+      "5 mg",
+      "7,5 mg",
+      "Mounjaro pausiert",
+    ]);
+    const pause = layout.spans.find((s) => s.pause)!;
+    expect(pause.row).toBe(0);
+    expect(pause.xStart).toBeGreaterThan(pieces[2].xStart);
+    expect(pause.xEnd).toBeLessThan(pieces[2].xEnd);
   });
 
   it("labels a pause as a pause, above the medication it interrupts", () => {
@@ -247,7 +387,7 @@ describe("layoutLane", () => {
       sub: "5 mg",
     });
     expect(itemLine(unknown, WORDS, "Startdatum fehlt")).toBe(
-      "Ramipril · 5 mg · Startdatum fehlt",
+      "Ramipril 5 mg (Startdatum fehlt)",
     );
     const layout = layoutLane(
       { lane: { key: "medications", items: [unknown] }, top: 0 },
@@ -540,9 +680,10 @@ describe("interaction", () => {
       TODAY,
     );
     const ids = entries.map((e) => e.item.id);
-    expect(ids).toEqual(["ill-5", "course-3", "v-4"]);
+    // The winter course is named by its medication, once.
+    expect(ids).toEqual(["ill-5", "vit-d", "v-4"]);
     // The winter course neither starts nor ends in January: it runs through.
-    expect(entries.find((e) => e.item.id === "course-3")?.through).toBe(true);
+    expect(entries.find((e) => e.item.id === "vit-d")?.through).toBe(true);
     expect(entries.find((e) => e.item.id === "ill-5")?.through).toBe(false);
     // Open since 2019 and 2018: the backdrop of every month, left out.
     expect(ids).not.toContain("ill-chronic");
diff --git a/src/components/timeline/__tests__/timeline-rework.test.tsx b/src/components/timeline/__tests__/timeline-rework.test.tsx
new file mode 100644
index 000000000..7a8f833a5
--- /dev/null
+++ b/src/components/timeline/__tests__/timeline-rework.test.tsx
@@ -0,0 +1,417 @@
+/**
+ * v1.42 (#613) — the timeline after the beta round:
+ *
+ *   - one medication is one entry on the phone and in the selection bar,
+ *     with its dose in the text;
+ *   - as many value lines as the record has kinds of value, drawn one row
+ *     each, the five data colours repeating past the fifth;
+ *   - the value picker is one compact button, "Values (n)";
+ *   - choosing a range opens over the page and does not push the chart;
+ *   - the legend explains the dashed stroke and the hollow point, in every
+ *     language the app ships.
+ */
+import { describe, expect, it } from "vitest";
+import { renderToStaticMarkup } from "react-dom/server";
+import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
+
+import type { TimelineResponse, TimelineSeries } from "@/lib/day/contract";
+import { I18nProvider } from "@/lib/i18n/context";
+import type { Locale } from "@/lib/i18n/config";
+
+import { ZoomControl } from "../range-picker";
+import { SelectionBar } from "../selection-bar";
+import { SERIES_PALETTE, assignSeriesColors } from "../series-colors";
+import type { SeriesValueFormat } from "../series-format";
+import { SeriesLines } from "../timeline-chart";
+import { TimelineChronicle } from "../timeline-chronicle";
+import {
+  SERIES_GAP,
+  SERIES_HEIGHT,
+  layoutTimeline,
+} from "../timeline-geometry";
+import { ValueSeriesMenu } from "../timeline-menus";
+import { TimelineLegend } from "../timeline-view";
+import { useSeriesValueFormat } from "../use-series-value-format";
+import { item, wordsIn } from "./timeline-fixture";
+
+const LOCALES: Locale[] = ["de", "en", "es", "fr", "it", "pl", "ko"];
+
+function render(node: React.ReactElement, locale: Locale = "en") {
+  return renderToStaticMarkup(
+    <QueryClientProvider client={new QueryClient()}>
+      <I18nProvider initialLocale={locale}>{node}</I18nProvider>
+    </QueryClientProvider>,
+  );
+}
+
+function text(html: string): string {
+  let out = "";
+  let inTag = false;
+  for (const ch of html) {
+    if (ch === "<") inTag = true;
+    else if (ch === ">") inTag = false;
+    else if (!inTag) out += ch;
+  }
+  return out;
+}
+
+function WithFormat({
+  build,
+}: {
+  build: (format: SeriesValueFormat) => React.ReactNode;
+}) {
+  return <>{build(useSeriesValueFormat())}</>;
+}
+
+const TODAY = "2025-12-31";
+const noop = () => undefined;
+
+/** Two medications as the server sends them: four bars, drawn item by item. */
+function twoMedications(): TimelineResponse {
+  return {
+    zoom: "year",
+    range: { from: "2025-01-01", to: TODAY, dataFrom: "2024-02-01" },
+    bucket: "month",
+    lanes: [
+      {
+        key: "medications",
+        items: [
+          item({
+            id: "rp",
+            group: "rp",
+            kind: "medication",
+            start: "2024-02-01",
+            open: true,
+            label: "Ramipril",
+            sub: "5 mg",
+          }),
+          item({
+            id: "rp-course",
+            group: "rp",
+            kind: "course",
+            start: "2025-02-01",
+            end: "2025-05-31",
+            label: "Ramipril",
+          }),
+          item({
+            id: "mj",
+            group: "mj",
+            kind: "medication",
+            start: "2025-01-06",
+            open: true,
+            label: "Mounjaro",
+            sub: "7.5 mg",
+          }),
+          item({
+            id: "mj-course",
+            group: "mj",
+            kind: "course",
+            start: "2025-01-06",
+            open: true,
+            label: "Mounjaro",
+          }),
+          item({
+            id: "mj-25",
+            group: "mj",
+            kind: "doseChange",
+            start: "2025-01-06",
+            label: "Mounjaro",
+            sub: "2.5 mg",
+          }),
+          item({
+            id: "mj-5",
+            group: "mj",
+            kind: "doseChange",
+            start: "2025-03-03",
+            label: "Mounjaro",
+            sub: "5 mg",
+          }),
+          item({
+            id: "mj-pause",
+            group: "mj",
+            kind: "pause",
+            start: "2025-08-01",
+            end: "2025-08-20",
+            label: "Mounjaro",
+          }),
+        ],
+      },
+    ],
+    standing: [],
+    series: [],
+    availableSeries: [],
+    notable: [],
+  };
+}
+
+describe("one medication, one entry", () => {
+  it("lays two medications on two rows, not four", () => {
+    const layout = layoutTimeline({
+      width: 1200,
+      window: { from: "2025-01-01", to: TODAY },
+      lanes: twoMedications().lanes,
+      series: [],
+      bucket: "month",
+      words: wordsIn("en"),
+      startMissing: "start unknown",
+      today: TODAY,
+    });
+    const lane = layout.lanes[0];
+    expect(lane.rows).toBe(2);
+    expect(new Set(lane.spans.map((s) => s.row))).toEqual(new Set([0, 1]));
+    const names = lane.labels.map((l) => l.text);
+    expect(names.filter((n) => n.startsWith("Mounjaro "))).toEqual([
+      "Mounjaro 2.5 mg",
+      "Mounjaro paused",
+    ]);
+    expect(names).toContain("5 mg");
+  });
+
+  it("names a medication once in the selection bar, with its dose", () => {
+    const html = render(
+      <WithFormat
+        build={(format) => (
+          <SelectionBar
+            timeline={twoMedications()}
+            selected="2025-03-10"
+            today={TODAY}
+            seriesLabel={(key) => key}
+            seriesColor={() => "var(--chart-1)"}
+            seriesFormat={format}
+            onOpenDay={noop}
+          />
+        )}
+      />,
+    );
+    const chips = [
+      ...html.matchAll(
+        /data-slot="timeline-selection-chip"[^>]*>(.*?)<\/button>/g,
+      ),
+    ].map((m) => text(m[1]));
+    expect(chips.filter((c) => c.startsWith("Mounjaro"))).toHaveLength(1);
+    expect(chips.find((c) => c.startsWith("Mounjaro"))).toMatch(
+      /^Mounjaro 5 mg, since \S/,
+    );
+    // Ramipril's course runs through March, closed: its own days, once.
+    expect(chips.filter((c) => c.startsWith("Ramipril"))).toHaveLength(1);
+    expect(text(html)).not.toMatch(/ongoing/i);
+  });
+
+  it("lists a medication's start once on the phone, with the dose taken then", () => {
+    const html = text(
+      render(
+        <WithFormat
+          build={(format) => (
+            <TimelineChronicle
+              timeline={twoMedications()}
+              today={TODAY}
+              grouping="month"
+              selected={null}
+              seriesColor={() => "var(--chart-1)"}
+              seriesFormat={format}
+              onOpenDay={noop}
+              onEditLifeEvent={null}
+            />
+          )}
+        />,
+      ),
+    );
+    // One "Mounjaro" chip in the running block, one start row with its
+    // first dose, the next dose as its own row, the pause and its end.
+    expect(html.match(/Mounjaro2\.5 mg/g)).toHaveLength(1);
+    expect(html.match(/Mounjaro5 mg/g)).toHaveLength(1);
+    expect(html).toContain("Mounjaro paused");
+    expect(html).toContain("Mounjaro resumed");
+    expect(html).not.toContain("7.5 mg");
+  });
+});
+
+/** Fifteen value lines, a point a month for a year. */
+function fifteenSeries(): TimelineSeries[] {
+  const keys = [
+    "BLOOD_PRESSURE_SYS",
+    "BLOOD_PRESSURE_DIA",
+    "WEIGHT",
+    "RESTING_HEART_RATE",
+    "PULSE",
+    "SLEEP_DURATION",
+    "BLOOD_GLUCOSE",
+    "BODY_FAT",
+    "HEART_RATE_VARIABILITY",
+    "ACTIVITY_STEPS",
+    "MOOD",
+    "BODY_TEMPERATURE",
+    "VO2_MAX",
+    "OXYGEN_SATURATION",
+    "RESPIRATORY_RATE",
+  ];
+  return keys.map((key, i) => ({
+    key,
+    unit: null,
+    points: Array.from({ length: 12 }, (_, m) => ({
+      t: `2025-${String(m + 1).padStart(2, "0")}-01`,
+      mean: 50 + i + m,
+      count: 5,
+    })),
+  }));
+}
+
+describe("no cap on value lines", () => {
+  it("lays out fifteen lines, one row each, the chart growing downwards", () => {
+    const series = fifteenSeries();
+    const started = performance.now();
+    const layout = layoutTimeline({
+      width: 1200,
+      window: { from: "2025-01-01", to: TODAY },
+      lanes: twoMedications().lanes,
+      series,
+      bucket: "month",
+      words: wordsIn("en"),
+      startMissing: "start unknown",
+      today: TODAY,
+    });
+    const took = performance.now() - started;
+    expect(layout.series).toHaveLength(15);
+    expect(layout.series.every((s) => s.points.length === 12)).toBe(true);
+    const lanesBottom = layout.lanes.at(-1)!.top + layout.lanes.at(-1)!.height;
+    expect(layout.seriesTop).toBe(lanesBottom + SERIES_GAP);
+    expect(layout.height).toBe(layout.seriesTop + 15 * SERIES_HEIGHT + 4);
+    // Rows never overlap.
+    for (let i = 1; i < layout.series.length; i++) {
+      expect(layout.series[i].top).toBe(
+        layout.series[i - 1].top + SERIES_HEIGHT,
+      );
+    }
+    // Generous for a slow runner; the layout is arithmetic over 180 points.
+    expect(took).toBeLessThan(250);
+  });
+
+  it("draws every line, each named, the five data colours repeating", () => {
+    const series = fifteenSeries();
+    const colours = assignSeriesColors(series.map((s) => s.key));
+    const layout = layoutTimeline({
+      width: 1200,
+      window: { from: "2025-01-01", to: TODAY },
+      lanes: [],
+      series,
+      bucket: "month",
+      words: wordsIn("en"),
+      startMissing: "",
+      today: TODAY,
+    });
+    const html = render(
+      <WithFormat
+        build={(format) => (
+          <svg>
+            <SeriesLines
+              layout={layout}
+              width={1200}
+              selectedBucket={null}
+              bucket="month"
+              seriesLabel={(key) => `Line ${key}`}
+              seriesColor={(key) => colours.get(key)!}
+              intl="en-GB"
+              t={(key) => key}
+              fmt={format}
+            />
+          </svg>
+        )}
+      />,
+    );
+    const drawn = [
+      ...html.matchAll(/data-series="([A-Z0-9_]+)" data-color="([^"]+)"/g),
+    ];
+    expect(drawn).toHaveLength(15);
+    for (const [, , colour] of drawn) {
+      expect(SERIES_PALETTE).toContain(colour);
+    }
+    expect(html).not.toContain('var(--foreground)" color');
+    for (const s of series) expect(text(html)).toContain(`Line ${s.key}`);
+  });
+});
+
+describe("the value picker", () => {
+  it("is one button that counts the chosen lines and lists none of them", () => {
+    const chosen = fifteenSeries().map((s) => s.key);
+    for (const locale of LOCALES) {
+      const html = render(
+        <ValueSeriesMenu
+          options={chosen}
+          selected={chosen}
+          label={(key) => `Name of ${key}`}
+          color={() => "var(--chart-1)"}
+          onChange={noop}
+        />,
+        locale,
+      );
+      expect(html).toContain('data-slot="timeline-values-trigger"');
+      expect(html).toContain('data-count="15"');
+      expect(text(html)).toContain("(15)");
+      expect(text(html)).not.toContain("Name of");
+      expect(text(html)).not.toMatch(/timeline\./);
+    }
+  });
+});
+
+describe("choosing a range", () => {
+  it("keeps the fields out of the page until the range segment opens them", () => {
+    const html = render(
+      <ZoomControl
+        options={[
+          { value: "all", label: "All" },
+          { value: "year", label: "12 months" },
+          { value: "quarter", label: "3 months" },
+          { value: "range", label: "Range" },
+        ]}
+        zoom="range"
+        label="View range"
+        initialRange={{ from: "2025-03-01", to: "2025-04-15" }}
+        today={TODAY}
+        dataFrom="2024-02-01"
+        onZoom={noop}
+        onApply={noop}
+      />,
+    );
+    // The zoom control alone: no date fields in the flow above the chart,
+    // so opening and closing them cannot move it.
+    expect(html).toContain('data-slot="timeline-zoom"');
+    expect(html).toContain('data-value="range"');
+    expect(html).toMatch(
+      /data-value="range"[^>]*aria-checked="true"|aria-checked="true"[^>]*data-value="range"/,
+    );
+    expect(html).not.toContain('data-slot="timeline-range"');
+    expect(html).not.toContain("timeline-range-from");
+  });
+});
+
+describe("the legend", () => {
+  it.each(LOCALES)(
+    "explains the dashed stroke and the hollow point, each with its symbol (%s)",
+    (locale) => {
+      const html = render(<TimelineLegend bucket="month" hasSeries />, locale);
+      for (const slot of ["timeline-legend-gap", "timeline-legend-thin"]) {
+        const start = html.indexOf(`data-slot="${slot}"`);
+        expect(start).toBeGreaterThan(-1);
+        const entry = html.slice(start, html.indexOf("</span>", start));
+        expect(entry).toContain("<svg");
+        expect(text(`<x ${entry}`).trim().length).toBeGreaterThan(3);
+      }
+      const gap = html.slice(html.indexOf('data-slot="timeline-legend-gap"'));
+      expect(gap.slice(0, gap.indexOf("</svg>"))).toContain(
+        'stroke-dasharray="3 3"',
+      );
+      const thin = html.slice(html.indexOf('data-slot="timeline-legend-thin"'));
+      expect(thin.slice(0, thin.indexOf("</svg>"))).toContain(
+        'fill="var(--card)"',
+      );
+      expect(text(html)).not.toMatch(/timeline\./);
+      expect(text(html)).not.toContain("·");
+    },
+  );
+
+  it("leaves the value marks out when no line is drawn", () => {
+    const html = render(<TimelineLegend bucket="month" hasSeries={false} />);
+    expect(html).not.toContain("timeline-legend-gap");
+    expect(html).not.toContain("timeline-legend-thin");
+  });
+});
diff --git a/src/components/timeline/chronicle-model.ts b/src/components/timeline/chronicle-model.ts
index 4baef2406..07ee8f3b7 100644
--- a/src/components/timeline/chronicle-model.ts
+++ b/src/components/timeline/chronicle-model.ts
@@ -9,9 +9,14 @@
  * runs for a while and ends (an episode, a winter course) is drawn as a thin
  * rail beside the rows it spans.
  *
- * Empty stretches are said out loud: "April to August 2025 · no entries"
- * rather than months silently skipped, so a gap reads as a gap and not as a
- * list that forgot something.
+ * Empty stretches are said out loud: "No entries from April to August
+ * 2025" rather than months silently skipped, so a gap reads as a gap and not
+ * as a list that forgot something.
+ *
+ * A medication is listed once per thing that happened to it
+ * (`medicationListItems`): its start with the dose taken then, each later
+ * dose change, each pause and its end, and its end. A course and the
+ * medication it belongs to never both start on the same row.
  */
 import type {
   DayNotableKind,
@@ -27,6 +32,7 @@ import {
   monthsBetween,
   startOfMonth,
 } from "./timeline-dates";
+import { groupKey, medicationListItems } from "./medication-rows";
 import { LANE_ORDER, isSpan } from "./timeline-geometry";
 
 export type ChronicleGrouping = "month" | "year";
@@ -71,6 +77,13 @@ export interface StandingChip {
   count: number;
 }
 
+/** A lane's items as a list shows them: a medication's once per event. */
+function listItems(lane: TimelineLane): readonly TimelineItem[] {
+  return lane.key === "medications"
+    ? medicationListItems(lane.items)
+    : lane.items;
+}
+
 /** The group a date belongs to: `YYYY-MM-01` or `YYYY-01-01`. */
 export function groupOf(date: string, grouping: ChronicleGrouping): string {
   return grouping === "month"
@@ -100,7 +113,8 @@ function groupsBetween(
 /**
  * The Ongoing block: what has no start (`standing`) and every period still
  * open, each period named by `label` (`item-words.ts`, so a running pause
- * reads as paused). Allergies fold into one chip when there is more than one.
+ * reads as paused). A medication is one chip, its running pause before its
+ * running course. Allergies fold into one chip when there is more than one.
  */
 export function standingChips(
   timeline: Pick<TimelineResponse, "lanes" | "standing">,
@@ -116,9 +130,20 @@ export function standingChips(
   for (const key of LANE_ORDER) {
     if (key === "life" || key === "cycle") continue;
     const lane = timeline.lanes.find((l) => l.key === key);
-    for (const item of lane?.items ?? []) {
-      if (item.open)
-        push({ lane: key, id: item.id, label: label(item), count: 1 });
+    const open = (lane?.items ?? []).filter((item) => item.open);
+    const shown = new Set<string>();
+    // A pause first: a medication on pause reads as paused, not as taken.
+    const ordered =
+      key === "medications"
+        ? [...open].sort(
+            (a, b) => Number(b.kind === "pause") - Number(a.kind === "pause"),
+          )
+        : open;
+    for (const item of ordered) {
+      const id = key === "medications" ? groupKey(item) : item.id;
+      if (shown.has(id)) continue;
+      shown.add(id);
+      push({ lane: key, id, label: label(item), count: 1 });
     }
   }
   const ordered = chips.sort(
@@ -143,7 +168,7 @@ export function chronicleEntries(
 ): ChronicleEntry[] {
   const out: ChronicleEntry[] = [];
   for (const lane of timeline.lanes) {
-    for (const item of lane.items) {
+    for (const item of listItems(lane)) {
       if (!isSpan(item)) {
         out.push({
           kind: "item",
@@ -196,7 +221,7 @@ function railSpans(lanes: readonly TimelineLane[]) {
   const out: Array<{ lane: RailLane; start: string; end: string }> = [];
   for (const lane of lanes) {
     if (!(RAIL_LANES as readonly string[]).includes(lane.key)) continue;
-    for (const item of lane.items) {
+    for (const item of listItems(lane)) {
       if (item.open || !item.end || item.end === item.start) continue;
       out.push({
         lane: lane.key as RailLane,
diff --git a/src/components/timeline/item-words.ts b/src/components/timeline/item-words.ts
index b526dd18c..dafa94dcb 100644
--- a/src/components/timeline/item-words.ts
+++ b/src/components/timeline/item-words.ts
@@ -124,7 +124,8 @@ export function makeItemWords(
 /**
  * The line an item reads as: its label, its second line (a dose change's
  * dose is drawn as its own mark, so it is left out here) and the
- * unknown-start note.
+ * unknown-start note in brackets: "Ramipril 5 mg (start unknown)". The
+ * parts are set apart by a space, never by a separator glyph.
  */
 export function itemLine(
   item: TimelineItem,
@@ -132,10 +133,10 @@ export function itemLine(
   startMissing: string,
 ): string {
   const { label, sub } = words(item);
-  const parts = [label];
-  if (sub && item.kind !== "doseChange") parts.push(sub);
-  if (!item.startKnown) parts.push(startMissing);
-  return parts.filter(Boolean).join(" · ");
+  const base = [label, item.kind === "doseChange" ? null : sub]
+    .filter(Boolean)
+    .join(" ");
+  return item.startKnown || !startMissing ? base : `${base} (${startMissing})`;
 }
 
 /** {@link makeItemWords} with the bundle in hand. */
diff --git a/src/components/timeline/medication-rows.ts b/src/components/timeline/medication-rows.ts
new file mode 100644
index 000000000..26320374d
--- /dev/null
+++ b/src/components/timeline/medication-rows.ts
@@ -0,0 +1,256 @@
+/**
+ * One medication, one row (v1.42, #613).
+ *
+ * The server reads a medication from four tables and sends what each holds:
+ * the medication's own start and end, its courses, its dose changes and its
+ * pauses, every one of them tagged with the medication's id as `group`.
+ * Drawn item by item, a medication with a course read as two medications
+ * ("Mounjaro 7.5 mg" above "Mounjaro"), and a dose change as a third thing
+ * beside them. Here the items of one medication become one thing again:
+ *
+ *   - the stretches it was taken are its courses, or its own span when it
+ *     has none (the span of a medication with courses covers the gaps
+ *     between them, when it was not taken);
+ *   - each dose change cuts the stretch it falls into, and every piece
+ *     carries the dose in effect, so the bar reads "2.5 mg", then "5 mg";
+ *   - a pause is a gap in the same bar.
+ *
+ * The chart, the selection bar, the phone chronicle and the screen-reader
+ * table all read a medication through here, so they agree on what it is.
+ */
+import type { TimelineItem } from "@/lib/day/contract";
+
+import { dayKey, dayNumber } from "./timeline-dates";
+
+/** What every item of one medication says together. */
+export interface MedicationGroup {
+  key: string;
+  /** The medication's name. */
+  label: string;
+  href: string | null;
+  /** The stretches it was taken, oldest first: its courses, or its span. */
+  periods: TimelineItem[];
+  /** Taken once (a one-time medication): a point, not a stretch. */
+  points: TimelineItem[];
+  pauses: TimelineItem[];
+  /** Dose changes, oldest first. */
+  doses: TimelineItem[];
+  /** The medication's own item, when it was sent. */
+  medication: TimelineItem | null;
+}
+
+/** The group an item belongs to; an item without one stands alone. */
+export function groupKey(item: TimelineItem): string {
+  return item.group ?? item.id;
+}
+
+const byStart = (a: TimelineItem, b: TimelineItem) =>
+  a.start < b.start ? -1 : a.start > b.start ? 1 : 0;
+
+/** A span is anything with an end or still open; the rest are points. */
+function spans(item: TimelineItem): boolean {
+  return item.open || (item.end !== null && item.end !== item.start);
+}
+
+/** The medications lane's items, one group per medication, oldest first. */
+export function medicationGroups(
+  items: readonly TimelineItem[],
+): MedicationGroup[] {
+  const byKey = new Map<string, TimelineItem[]>();
+  for (const item of items) {
+    const key = groupKey(item);
+    const list = byKey.get(key);
+    if (list) list.push(item);
+    else byKey.set(key, [item]);
+  }
+  const groups: MedicationGroup[] = [];
+  for (const [key, list] of byKey) {
+    const medication = list.find((i) => i.kind === "medication") ?? null;
+    const courses = list.filter((i) => i.kind === "course").sort(byStart);
+    const own = medication && courses.length === 0 ? [medication] : [];
+    const stretches = [...courses, ...own];
+    groups.push({
+      key,
+      label: medication?.label ?? list[0].label,
+      href: medication?.href ?? list[0].href,
+      periods: stretches.filter(spans).sort(byStart),
+      points: stretches.filter((i) => !spans(i)).sort(byStart),
+      pauses: list.filter((i) => i.kind === "pause").sort(byStart),
+      doses: list.filter((i) => i.kind === "doseChange").sort(byStart),
+      medication,
+    });
+  }
+  const first = (g: MedicationGroup) =>
+    [...g.periods, ...g.points, ...g.pauses, ...g.doses]
+      .map((i) => i.start)
+      .sort()[0] ?? "";
+  return groups.sort((a, b) =>
+    first(a) < first(b) ? -1 : first(a) > first(b) ? 1 : 0,
+  );
+}
+
+/**
+ * The dose in effect on `day`: the last dose change on or before it. With
+ * no dose change at all, the medication's own dose; before the first one,
+ * nothing, because what was taken then is not recorded.
+ */
+export function doseAt(group: MedicationGroup, day: string): string | null {
+  if (group.doses.length === 0) return group.medication?.sub ?? null;
+  let dose: string | null = null;
+  for (const change of group.doses) {
+    if (change.start > day) break;
+    dose = change.sub;
+  }
+  return dose;
+}
+
+/** One piece of a stretch: the days one dose was taken. */
+export interface DoseSegment {
+  start: string;
+  /** Last day, inclusive; null while the stretch is open. */
+  end: string | null;
+  dose: string | null;
+  /** The dose change the piece begins with, or null for the first piece. */
+  change: TimelineItem | null;
+  first: boolean;
+  last: boolean;
+}
+
+/** A stretch cut at every dose change that falls inside it. */
+export function doseSegments(
+  group: MedicationGroup,
+  period: TimelineItem,
+): DoseSegment[] {
+  const end = period.open ? null : (period.end ?? period.start);
+  const cuts = group.doses.filter(
+    (d) => d.start > period.start && (end === null || d.start <= end),
+  );
+  const out: DoseSegment[] = [];
+  let start = period.start;
+  let change: TimelineItem | null = null;
+  for (const cut of cuts) {
+    if (cut.start === start) {
+      change = cut;
+      continue;
+    }
+    out.push({
+      start,
+      end: dayKey(dayNumber(cut.start) - 1),
+      dose: change ? change.sub : doseAt(group, start),
+      change,
+      first: false,
+      last: false,
+    });
+    start = cut.start;
+    change = cut;
+  }
+  out.push({
+    start,
+    end,
+    dose: change ? change.sub : doseAt(group, start),
+    change,
+    first: false,
+    last: false,
+  });
+  out[0].first = true;
+  out[out.length - 1].last = true;
+  return out;
+}
+
+/** Dose changes that fall into no stretch: drawn as a mark of their own. */
+export function strayDoses(group: MedicationGroup): TimelineItem[] {
+  return group.doses.filter(
+    (d) =>
+      !group.periods.some(
+        (p) => d.start >= p.start && (p.open || d.start <= (p.end ?? p.start)),
+      ),
+  );
+}
+
+/**
+ * The medications lane as the phone chronicle and the screen-reader table
+ * list it: one medication's start and end once (from its courses when it has
+ * any), each with the dose taken then, and a dose change that falls on a
+ * start folded into that start rather than listed beside it.
+ */
+export function medicationListItems(
+  items: readonly TimelineItem[],
+): TimelineItem[] {
+  const out: TimelineItem[] = [];
+  for (const group of medicationGroups(items)) {
+    const starts = new Set(
+      [...group.periods, ...group.points].map((p) => p.start),
+    );
+    for (const p of [...group.periods, ...group.points]) {
+      out.push({ ...p, label: group.label, sub: doseAt(group, p.start) });
+    }
+    out.push(...group.pauses);
+    out.push(...group.doses.filter((d) => !starts.has(d.start)));
+  }
+  return out.sort(byStart);
+}
+
+/**
+ * One medication in the selection bar for the period `[from, to]`, or null
+ * when nothing of it happens there. The entry is one item, in the shapes
+ * the bar already words: a pause in the period names it as paused; else a
+ * dose change in the period names the new dose from its day; else the
+ * stretch that touches the period, with the dose taken at its end. A
+ * stretch open since before the period is its backdrop and left out, as
+ * every other lane leaves it.
+ */
+export function medicationPeriodItem(
+  group: MedicationGroup,
+  from: string,
+  to: string,
+  today: string,
+): TimelineItem | null {
+  const touches = (item: TimelineItem) => {
+    const end = item.open ? today : (item.end ?? item.start);
+    return item.start <= to && end >= from;
+  };
+  const pause = group.pauses.filter(touches).at(-1);
+  if (pause) return { ...pause, id: group.key, label: group.label };
+  const stretches = [...group.periods, ...group.points]
+    .filter(touches)
+    .sort(byStart);
+  const change = group.doses
+    .filter((d) => d.start >= from && d.start <= to)
+    .at(-1);
+  const base = {
+    id: group.key,
+    kind: "medication" as const,
+    label: group.label,
+    href: group.href,
+    group: group.key,
+    precision: "DAY" as const,
+  };
+  if (change) {
+    const host = stretches.find(
+      (s) =>
+        s.start <= change.start &&
+        (s.open || (s.end ?? s.start) >= change.start),
+    );
+    return {
+      ...base,
+      start: change.start,
+      end: host ? host.end : null,
+      open: host ? host.open : false,
+      startKnown: true,
+      sub: change.sub,
+    };
+  }
+  const last = stretches.at(-1);
+  if (!last) return null;
+  if (last.open && last.start < from) return null;
+  const end = last.open ? today : (last.end ?? last.start);
+  return {
+    ...base,
+    start: last.start,
+    end: last.end,
+    open: last.open,
+    startKnown: last.startKnown,
+    precision: last.precision,
+    sub: doseAt(group, end < to ? end : to),
+  };
+}
diff --git a/src/components/timeline/range-picker.tsx b/src/components/timeline/range-picker.tsx
new file mode 100644
index 000000000..69063c358
--- /dev/null
+++ b/src/components/timeline/range-picker.tsx
@@ -0,0 +1,177 @@
+"use client";
+
+/**
+ * Choosing a range (v1.42, #613). On a wide screen the "Range" segment of
+ * the zoom control opens a popover anchored to it; on a phone the range
+ * button opens a sheet. Both hold the two date fields and "Apply", and
+ * neither pushes the chart down: the timeline stays where it was until the
+ * range is applied, and only then does the URL change (`?zoom=range&from=
+ * &to=`), so Back and a bookmark keep working as before.
+ *
+ * The fields edit a draft. Each change is made honest on the way in
+ * (`RangeFields` clamps it), and the draft starts as the range in the URL,
+ * or, before there is one, as what the chart shows.
+ */
+import { useState, type ReactElement } from "react";
+import { Popover as PopoverPrimitive } from "radix-ui";
+
+import { Button } from "@/components/ui/button";
+import { Popover, PopoverContent } from "@/components/ui/popover";
+import { ResponsiveSheet } from "@/components/ui/responsive-sheet";
+import type { TimelineZoom } from "@/lib/day/contract";
+import { useTranslations } from "@/lib/i18n/context";
+
+import { RangeFields } from "./range-fields";
+import { Segmented, type SegmentedOption } from "./segmented";
+import type { TimelineRange } from "./timeline-url";
+
+interface RangeLimits {
+  today: string;
+  /** The record's first entry, once known. */
+  dataFrom: string | null;
+}
+
+/** The zoom control, with the range popover hung on its "Range" segment. */
+export function ZoomControl({
+  options,
+  zoom,
+  label,
+  initialRange,
+  today,
+  dataFrom,
+  onZoom,
+  onApply,
+}: RangeLimits & {
+  options: ReadonlyArray<SegmentedOption<TimelineZoom>>;
+  zoom: TimelineZoom;
+  label: string;
+  /** Where the draft starts when the popover opens. */
+  initialRange: TimelineRange;
+  onZoom: (next: Exclude<TimelineZoom, "range">) => void;
+  onApply: (range: TimelineRange) => void;
+}) {
+  const { t } = useTranslations();
+  const [open, setOpen] = useState(false);
+  const [draft, setDraft] = useState(initialRange);
+  const anchor = (value: TimelineZoom, button: ReactElement) =>
+    value === "range" ? (
+      <PopoverPrimitive.Anchor asChild>{button}</PopoverPrimitive.Anchor>
+    ) : (
+      button
+    );
+  return (
+    <Popover open={open} onOpenChange={setOpen}>
+      <Segmented
+        options={options}
+        value={zoom}
+        onChange={(next) => {
+          if (next !== "range") {
+            setOpen(false);
+            onZoom(next);
+            return;
+          }
+          setDraft(initialRange);
+          setOpen(true);
+        }}
+        label={label}
+        slot="timeline-zoom"
+        wrapOption={anchor}
+      />
+      <PopoverContent
+        align="start"
+        className="w-auto max-w-none space-y-4 p-4 text-sm"
+        data-slot="timeline-range-popover"
+        aria-label={t("timeline.range.open")}
+      >
+        <p className="font-semibold">{t("timeline.range.open")}</p>
+        <RangeFields
+          range={draft}
+          today={today}
+          dataFrom={dataFrom}
+          onChange={setDraft}
+        />
+        <div className="flex justify-end">
+          <Button
+            size="sm"
+            className="min-h-11 sm:min-h-9"
+            data-slot="timeline-range-apply"
+            onClick={() => {
+              onApply(draft);
+              setOpen(false);
+            }}
+          >
+            {t("timeline.range.apply")}
+          </Button>
+        </div>
+      </PopoverContent>
+    </Popover>
+  );
+}
+
+/** The phone's range sheet: the fields, "Apply", and the way back. */
+export function RangeSheet({
+  open,
+  onOpenChange,
+  initialRange,
+  today,
+  dataFrom,
+  onApply,
+  onClear,
+}: RangeLimits & {
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+  initialRange: TimelineRange;
+  onApply: (range: TimelineRange) => void;
+  /** Back to the whole record; offered only while a range is chosen. */
+  onClear: (() => void) | null;
+}) {
+  const { t } = useTranslations();
+  const [draft, setDraft] = useState(initialRange);
+  // The draft starts over each time the sheet opens.
+  const [wasOpen, setWasOpen] = useState(open);
+  if (open !== wasOpen) {
+    setWasOpen(open);
+    if (open) setDraft(initialRange);
+  }
+  return (
+    <ResponsiveSheet
+      open={open}
+      onOpenChange={onOpenChange}
+      title={t("timeline.range.open")}
+      footer={
+        <>
+          {onClear && (
+            <Button
+              variant="outline"
+              className="min-h-11"
+              data-slot="timeline-range-clear"
+              onClick={() => {
+                onClear();
+                onOpenChange(false);
+              }}
+            >
+              {t("timeline.range.clear")}
+            </Button>
+          )}
+          <Button
+            className="min-h-11"
+            data-slot="timeline-range-apply"
+            onClick={() => {
+              onApply(draft);
+              onOpenChange(false);
+            }}
+          >
+            {t("timeline.range.apply")}
+          </Button>
+        </>
+      }
+    >
+      <RangeFields
+        range={draft}
+        today={today}
+        dataFrom={dataFrom}
+        onChange={setDraft}
+      />
+    </ResponsiveSheet>
+  );
+}
diff --git a/src/components/timeline/segmented.tsx b/src/components/timeline/segmented.tsx
index 3dc1f0f8d..47033830d 100644
--- a/src/components/timeline/segmented.tsx
+++ b/src/components/timeline/segmented.tsx
@@ -9,6 +9,8 @@
  * the sheets' discard guard reads any checked radio as the person's input,
  * and a precision that starts on "Day" is a default, not an answer.
  */
+import { Fragment, type ReactElement, type ReactNode } from "react";
+
 import { useRovingRadioGroup } from "@/hooks/use-roving-radio-group";
 import { cn } from "@/lib/utils";
 
@@ -26,6 +28,7 @@ export function Segmented<T extends string>({
   className,
   stretch = false,
   asToggleButtons = false,
+  wrapOption,
 }: {
   options: ReadonlyArray<SegmentedOption<T>>;
   value: T;
@@ -35,6 +38,11 @@ export function Segmented<T extends string>({
   className?: string;
   stretch?: boolean;
   asToggleButtons?: boolean;
+  /**
+   * Wraps one segment's button, for a popover anchored to it (the range
+   * segment). Returns the button itself for every other segment.
+   */
+  wrapOption?: (value: T, button: ReactElement) => ReactNode;
 }) {
   const selectedIndex = options.findIndex((o) => o.value === value);
   const { getRadioProps } = useRovingRadioGroup({
@@ -55,7 +63,7 @@ export function Segmented<T extends string>({
     >
       {options.map((option, index) => {
         const checked = option.value === value;
-        return (
+        const button = (
           <button
             key={option.value}
             type="button"
@@ -79,6 +87,13 @@ export function Segmented<T extends string>({
             {option.label}
           </button>
         );
+        return wrapOption ? (
+          <Fragment key={option.value}>
+            {wrapOption(option.value, button)}
+          </Fragment>
+        ) : (
+          button
+        );
       })}
     </div>
   );
diff --git a/src/components/timeline/selection-bar.tsx b/src/components/timeline/selection-bar.tsx
index 64ab30eeb..a1b717684 100644
--- a/src/components/timeline/selection-bar.tsx
+++ b/src/components/timeline/selection-bar.tsx
@@ -1,7 +1,7 @@
 "use client";
 
 /**
- * The bar under the chart (v1.42, #613): a cross-section of one bucket, the
+ * The cross-section under the chart (v1.42, #613): one bucket, the
  * one that holds the selected day. Its head names the bucket outright ("July
  * to September 2026", "September 2026", "Week of 22 September 2026"), so a
  * value that changes with the zoom says why: it is the mean of a different
@@ -12,6 +12,12 @@
  *
  * It is also where a label the chart had to leave out is read in full, and
  * where each keyboard step on the chart is announced (`aria-live`).
+ *
+ * It sits on the card's own surface, set off from the chart by a hairline
+ * above it, not in a box of its own. An entry's parts are joined by commas,
+ * a period still open reads "since 3 Mar." (it needs no "ongoing"), and a
+ * medication is one entry however many of its items touch the bucket
+ * (`medicationPeriodItem`).
  */
 import { ArrowRight } from "lucide-react";
 
@@ -86,7 +92,7 @@ export function SelectionBar({
 
   return (
     <div
-      className="bg-muted/60 flex flex-wrap items-center gap-x-3 gap-y-2 rounded-lg px-3 py-2.5"
+      className="border-border flex flex-wrap items-center gap-x-3 gap-y-2 border-t pt-3"
       data-slot="timeline-selection-bar"
       data-bucket={bucket}
       data-period-from={periodFrom}
@@ -122,32 +128,34 @@ export function SelectionBar({
           {t("timeline.selection.empty")}
         </span>
       )}
-      {entries.map(({ lane, item, through }) => {
+      {entries.map(({ lane, item }) => {
         // A chip opens the day its entry touches inside this period.
         const day =
           item.start >= periodFrom && item.start <= periodTo
             ? item.start
             : periodFrom;
         const canOpenDay = item.precision === "DAY" && day <= today;
-        const when =
-          item.open || through
-            ? t("timeline.selection.ongoing")
-            : item.end && item.end !== item.start
-              ? t("timeline.selection.range", {
-                  from: formatDayMonth(item.start, intl),
-                  to: formatDayMonth(item.end, intl),
-                })
-              : item.precision === "DAY"
-                ? formatDayMonth(item.start, intl)
-                : formatAtPrecision(item.start, item.precision, intl);
+        const at = (date: string) =>
+          item.precision === "DAY"
+            ? formatDayMonth(date, intl)
+            : formatAtPrecision(date, item.precision, intl);
+        const when = item.open
+          ? t("timeline.selection.since", { date: at(item.start) })
+          : item.end && item.end !== item.start
+            ? t("timeline.selection.range", {
+                from: at(item.start),
+                to: at(item.end),
+              })
+            : at(item.start);
         const { label, sub } = words(item);
-        const text = [label, sub, when].filter(Boolean).join(" · ");
+        const name = [label, sub].filter(Boolean).join(" ");
+        const text = `${name}, ${when}`;
         const editable = item.kind === "lifeEvent" && onEditLifeEvent;
         if (!canOpenDay && !editable) {
           return (
             <span
               key={`${lane}-${item.id}`}
-              className="bg-background text-foreground text-2xs inline-flex items-center gap-1.5 rounded-full px-2.5 py-1 font-medium"
+              className="bg-muted text-foreground text-2xs inline-flex items-center gap-1.5 rounded-full px-2.5 py-1 font-medium"
             >
               <span
                 className="size-1.5 shrink-0 rounded-full"
@@ -167,7 +175,7 @@ export function SelectionBar({
             onClick={() =>
               editable ? onEditLifeEvent(item.id) : onOpenDay(day)
             }
-            className="bg-background text-foreground text-2xs hover:bg-accent focus-visible:ring-ring/50 inline-flex min-h-11 items-center gap-1.5 rounded-full px-2.5 py-1 font-medium outline-none focus-visible:ring-2 sm:min-h-7"
+            className="bg-muted text-foreground text-2xs hover:bg-accent focus-visible:ring-ring/50 inline-flex min-h-11 items-center gap-1.5 rounded-full px-2.5 py-1 font-medium outline-none focus-visible:ring-2 sm:min-h-7"
           >
             <span
               className="size-1.5 shrink-0 rounded-full"
diff --git a/src/components/timeline/series-colors.ts b/src/components/timeline/series-colors.ts
index 3ac4b6a37..e8b7c123d 100644
--- a/src/components/timeline/series-colors.ts
+++ b/src/components/timeline/series-colors.ts
@@ -6,11 +6,11 @@
  * same colour on both pages. Where two chosen lines would share a colour
  * (systolic and diastolic, or resting pulse beside blood pressure) or a type
  * has none (mood), the later one takes the first `--chart-N` still free.
- * There are five data tokens and up to six lines; a sixth line with nothing
- * free left is drawn in `--foreground`, which is still apart from the other
- * five. The order of `rank` decides who keeps a contested colour, so the
- * same set of lines is coloured the same way whatever order it was picked
- * in.
+ * There are five data tokens and no cap on the lines: once all five are
+ * taken, the next lines take them again in palette order. Every line is
+ * named at its left, so a repeated colour never leaves a line unnamed. The
+ * order of `rank` decides who keeps a contested colour, so the same set of
+ * lines is coloured the same way whatever order it was picked in.
  */
 import { MEASUREMENT_TYPE_COLORS } from "@/components/measurements/measurement-type-colors";
 
@@ -22,9 +22,6 @@ export const SERIES_PALETTE = [
   "var(--chart-5)",
 ] as const;
 
-/** The colour once every data token is taken. */
-export const SERIES_FALLBACK_COLOR = "var(--foreground)";
-
 /** The type's own colour, as a `var(--chart-N)` string, or null. */
 export function preferredSeriesColor(key: string): string | null {
   const match = /\btext-chart-([1-5])\b/.exec(
@@ -59,10 +56,11 @@ export function assignSeriesColors(
       taken.add(own);
     }
   }
+  let repeat = 0;
   for (const key of ordered) {
     if (out.has(key)) continue;
     const free = SERIES_PALETTE.find((c) => !taken.has(c));
-    const color = free ?? SERIES_FALLBACK_COLOR;
+    const color = free ?? SERIES_PALETTE[repeat++ % SERIES_PALETTE.length];
     out.set(key, color);
     taken.add(color);
   }
diff --git a/src/components/timeline/timeline-chart.tsx b/src/components/timeline/timeline-chart.tsx
index 2004eb12d..e516a3611 100644
--- a/src/components/timeline/timeline-chart.tsx
+++ b/src/components/timeline/timeline-chart.tsx
@@ -51,7 +51,8 @@ import type {
 import { resolveIntlLocale } from "@/lib/format-locale";
 import { useTranslations } from "@/lib/i18n/context";
 
-import { useItemWords, type ItemWordsFn } from "./item-words";
+import { itemLine, useItemWords, type ItemWordsFn } from "./item-words";
+import { medicationListItems } from "./medication-rows";
 import { TIMELINE_LANE_LABEL_KEY } from "./label-keys";
 import {
   bucketAfter,
@@ -168,7 +169,7 @@ export function TimelineChart({
             series: timeline.series,
             bucket: timeline.bucket,
             words,
-            startMissing: t("timeline.startMissing"),
+            startMissing: t("timeline.startUnknown"),
             today,
           })
         : null,
@@ -426,9 +427,11 @@ function ChartBody({
             >
               {fitText(t(TIMELINE_LANE_LABEL_KEY[lane.key]), scale.x0 - 30, 13)}
             </text>
+            {/* A medication's bar is drawn in pieces of one item, so a
+                piece is keyed by its item and its own first day. */}
             {lane.spans.map((span) => (
               <SpanMark
-                key={span.item.id}
+                key={`${span.item.id}:${span.segment?.start ?? span.item.start}`}
                 span={span}
                 color={color}
                 x0={scale.x0}
@@ -444,9 +447,9 @@ function ChartBody({
                 intl={intl}
               />
             ))}
-            {lane.labels.map((label) => (
+            {lane.labels.map((label, i) => (
               <text
-                key={`label-${label.itemId}`}
+                key={`label-${label.itemId}-${i}`}
                 x={label.x}
                 y={label.y}
                 fontSize={11}
@@ -676,20 +679,31 @@ export function SeriesLines({
   );
 }
 
+/**
+ * A bar's hover title: "Ramipril 5 mg: 12 Aug 2020 to 1 Jun 2021", or
+ * "since 12 Aug 2020" while it runs on. A dose's piece of a medication's
+ * bar names that dose and its own days.
+ */
 function spanTitle(
   span: PlacedSpan,
   intl: string,
   t: ReturnType<typeof useTranslations>["t"],
   words: ItemWordsFn,
 ): string {
-  const { item } = span;
+  const { item, segment } = span;
   const { label, sub } = words(item);
-  const from = formatAtPrecision(item.start, item.precision, intl);
-  const to = item.open
-    ? t("timeline.selection.ongoing")
-    : formatAtPrecision(item.end ?? item.start, item.precision, intl);
-  const name = sub ? `${label} · ${sub}` : label;
-  return `${name}: ${t("timeline.selection.range", { from, to })}`;
+  const name = [label, segment ? segment.dose : sub].filter(Boolean).join(" ");
+  const start = segment?.start ?? item.start;
+  const end = segment ? segment.end : item.open ? null : item.end;
+  const from = formatAtPrecision(start, item.precision, intl);
+  const when =
+    end === null
+      ? t("timeline.selection.since", { date: from })
+      : t("timeline.selection.range", {
+          from,
+          to: formatAtPrecision(end, item.precision, intl),
+        });
+  return `${name}: ${when}`;
 }
 
 export function SpanMark({
@@ -710,7 +724,7 @@ export function SpanMark({
   const title = spanTitle(span, intl, t, words);
   if (span.pause) {
     return (
-      <g data-kind="pause">
+      <g data-kind="pause" data-item={item.id} data-row={span.row}>
         <title>{title}</title>
         <rect
           x={xStart}
@@ -726,10 +740,19 @@ export function SpanMark({
     );
   }
   const thick = item.open ? 3 : 7;
+  // Only a bar's first piece draws an unknown start, only its last an open
+  // end; a bar that is not cut is both.
+  const first = span.segment?.first ?? true;
+  const last = span.segment?.last ?? true;
   return (
-    <g data-kind={item.kind} data-item={item.id}>
+    <g
+      data-kind={item.kind}
+      data-item={item.id}
+      data-dose={span.segment?.dose ?? undefined}
+      data-row={span.row}
+    >
       <title>{title}</title>
-      {!item.startKnown && (
+      {!item.startKnown && first && (
         <line
           x1={Math.max(x0, xStart - 28)}
           x2={xStart}
@@ -750,7 +773,7 @@ export function SpanMark({
         fill={color}
         opacity={item.open ? 0.75 : 0.9}
       />
-      {item.open && (
+      {item.open && last && (
         <path
           d={`M${xEnd + 1} ${y - 4} l6 4 l-6 4z`}
           fill={color}
@@ -781,7 +804,7 @@ export function PointMark({
 }) {
   const { x, y, item, shape } = point;
   const { label, sub } = useItemWords()(item);
-  const title = `${label}${sub ? ` · ${sub}` : ""}: ${formatAtPrecision(item.start, item.precision, intl)}`;
+  const title = `${[label, sub].filter(Boolean).join(" ")}: ${formatAtPrecision(item.start, item.precision, intl)}`;
   let glyph: React.ReactNode;
   switch (shape) {
     case "diamond":
@@ -860,7 +883,7 @@ export function PointMark({
       );
   }
   return (
-    <g data-kind={item.kind} data-item={item.id}>
+    <g data-kind={item.kind} data-item={item.id} data-row={point.row}>
       <title>{title}</title>
       {glyph}
     </g>
@@ -884,7 +907,12 @@ function TimelineTable({
   const words = useItemWords();
   const rows = timeline.lanes
     .filter((lane) => !hiddenLanes.has(lane.key))
-    .flatMap((lane) => lane.items.map((item) => ({ lane: lane.key, item })))
+    .flatMap((lane) =>
+      (lane.key === "medications"
+        ? medicationListItems(lane.items)
+        : lane.items
+      ).map((item) => ({ lane: lane.key, item })),
+    )
     .sort((a, b) => dayNumber(b.item.start) - dayNumber(a.item.start));
   return (
     <table className="sr-only" data-slot="timeline-table">
@@ -901,22 +929,12 @@ function TimelineTable({
         {rows.map(({ lane, item }) => (
           <tr key={`${lane}-${item.id}`}>
             <td>{t(TIMELINE_LANE_LABEL_KEY[lane])}</td>
-            <td>
-              {[
-                words(item).label,
-                words(item).sub,
-                item.startKnown ? null : t("timeline.startMissing"),
-              ]
-                .filter(Boolean)
-                .join(" · ")}
-            </td>
+            <td>{itemLine(item, words, t("timeline.startUnknown"))}</td>
             <td>{formatAtPrecision(item.start, item.precision, intl)}</td>
             <td>
-              {item.open
-                ? t("timeline.selection.ongoing")
-                : isSpan(item) && item.end
-                  ? formatAtPrecision(item.end, item.precision, intl)
-                  : ""}
+              {!item.open && isSpan(item) && item.end
+                ? formatAtPrecision(item.end, item.precision, intl)
+                : ""}
             </td>
           </tr>
         ))}
@@ -1012,7 +1030,9 @@ function SeriesTable({
 
 /**
  * A means line with each value marked by its line's colour: "● 129/82 mmHg
- * · ● 82,6 kg". The dot is decoration; the text reads the same without it.
+ * ● 82,6 kg". The values stand apart by space, not by a separator glyph;
+ * a screen reader hears a comma between them. The dot is decoration; the
+ * text reads the same without it.
  */
 export function MeanPartsLine({
   parts,
@@ -1022,8 +1042,12 @@ export function MeanPartsLine({
   seriesColor: (key: string) => string;
 }) {
   return parts.map((part, i) => (
-    <span key={part.key} data-series={part.key}>
-      {i > 0 ? " · " : null}
+    <span
+      key={part.key}
+      data-series={part.key}
+      className={i > 0 ? "ml-3" : undefined}
+    >
+      {i > 0 ? <span className="sr-only">, </span> : null}
       <span
         data-slot="timeline-series-dot"
         className="mr-1 inline-block size-2 rounded-full align-middle"
diff --git a/src/components/timeline/timeline-chronicle.tsx b/src/components/timeline/timeline-chronicle.tsx
index df4bcc51f..ab7d777b6 100644
--- a/src/components/timeline/timeline-chronicle.tsx
+++ b/src/components/timeline/timeline-chronicle.tsx
@@ -168,13 +168,16 @@ export function TimelineChronicle({
     grouping === "month" ? formatMonthYear(group, intl) : group.slice(0, 4);
   const gapLabel = (from: string, to: string) => {
     if (from === to)
-      return t("timeline.chronicle.gapSingle", { period: groupLabel(from) });
+      return t("timeline.chronicle.emptySingle", { period: groupLabel(from) });
     const sameYear = from.slice(0, 4) === to.slice(0, 4);
     const fromText =
       grouping === "month" && sameYear
         ? formatMonthLong(from, intl)
         : groupLabel(from);
-    return t("timeline.chronicle.gap", { from: fromText, to: groupLabel(to) });
+    return t("timeline.chronicle.empty", {
+      from: fromText,
+      to: groupLabel(to),
+    });
   };
 
   function entryText(entry: ChronicleEntry): {
@@ -201,9 +204,9 @@ export function TimelineChronicle({
           : null,
       };
     }
-    const meta = [sub, item.startKnown ? null : t("timeline.startMissing")]
+    const meta = [sub, item.startKnown ? null : t("timeline.startUnknown")]
       .filter(Boolean)
-      .join(" · ");
+      .join(", ");
     return { title: label, meta: meta || null };
   }
 
diff --git a/src/components/timeline/timeline-geometry.ts b/src/components/timeline/timeline-geometry.ts
index c220aaa2e..86fffc96a 100644
--- a/src/components/timeline/timeline-geometry.ts
+++ b/src/components/timeline/timeline-geometry.ts
@@ -27,6 +27,13 @@ import type {
 } from "@/lib/day/contract";
 
 import { itemLine, type ItemWordsFn } from "./item-words";
+import {
+  doseSegments,
+  medicationGroups,
+  medicationPeriodItem,
+  strayDoses,
+  type MedicationGroup,
+} from "./medication-rows";
 import {
   addMonths,
   bucketAfter,
@@ -401,7 +408,6 @@ const POINT_SHAPE: Partial<Record<TimelineItemKind, PointShape>> = {
   procedure: "square",
   labDay: "ring",
   document: "tick",
-  doseChange: "doseMark",
 };
 
 export interface PlacedSpan {
@@ -414,6 +420,21 @@ export interface PlacedSpan {
   clippedLeft: boolean;
   /** A pause, drawn as an outlined gap over the period it interrupts. */
   pause: boolean;
+  /**
+   * One dose's piece of a medication's stretch (`medication-rows.ts`): the
+   * dose it carries, the dose change it begins with, and whether it is the
+   * stretch's first or last piece (only the first draws an unknown start,
+   * only the last an open end).
+   */
+  segment?: {
+    /** The piece's first and last day; `end` null while it runs on. */
+    start: string;
+    end: string | null;
+    dose: string | null;
+    change: TimelineItem | null;
+    first: boolean;
+    last: boolean;
+  };
 }
 
 export interface PlacedPoint {
@@ -463,8 +484,9 @@ interface LaneInput {
 
 /**
  * Lay out one lane: rows for the periods (first row that is free), points on
- * their own row above them, pauses and dose marks over the medication they
- * belong to, then the labels in priority order through one occupancy map.
+ * their own row above them, then the labels in priority order through one
+ * occupancy map. The medications lane is laid out per medication
+ * ({@link layoutMedicationLane}).
  */
 export function layoutLane(
   { lane, top }: LaneInput,
@@ -477,16 +499,20 @@ export function layoutLane(
     today: string;
   },
 ): LaneLayout {
+  if (lane.key === "medications") {
+    return layoutMedicationLane(
+      lane.key,
+      top,
+      lane.items,
+      window,
+      scale,
+      options,
+    );
+  }
   const visible = lane.items.filter((item) => inWindow(item, window));
-  const pointItems = visible.filter(
-    (item) => !isSpan(item) && item.kind !== "doseChange",
-  );
-  const doseItems = visible.filter((item) => item.kind === "doseChange");
-  const pauseItems = visible.filter(
-    (item) => item.kind === "pause" && isSpan(item),
-  );
+  const pointItems = visible.filter((item) => !isSpan(item));
   const spanItems = visible
-    .filter((item) => isSpan(item) && item.kind !== "pause")
+    .filter((item) => isSpan(item))
     .sort((a, b) => (a.start < b.start ? -1 : a.start > b.start ? 1 : 0));
 
   // Points take the first row(s); procedures sit on a second point row so
@@ -529,29 +555,6 @@ export function layoutLane(
     });
   }
 
-  // Pauses lie over the period they interrupt; one without a host gets a row.
-  for (const item of pauseItems) {
-    const xStart = Math.max(scale.x0, scale.x(item.start));
-    const xEnd = Math.min(
-      scale.x1,
-      item.end ? scale.x(dayNumber(item.end) + 1) : todayX,
-    );
-    const host = spans.find(
-      (s) => !s.pause && s.xStart <= xStart && s.xEnd >= xStart,
-    );
-    const row = host ? host.row : pointRows + rowEnds.length;
-    if (!host) rowEnds.push(xEnd);
-    spans.push({
-      item,
-      row,
-      y: rowY(row),
-      xStart,
-      xEnd: Math.max(xStart + 4, xEnd),
-      clippedLeft: false,
-      pause: true,
-    });
-  }
-
   const points: PlacedPoint[] = [];
   for (const item of pointItems) {
     const row = item.kind === "procedure" ? procedureRow : 0;
@@ -563,14 +566,6 @@ export function layoutLane(
       shape: POINT_SHAPE[item.kind] ?? "dot",
     });
   }
-  // Dose marks sit on the medication line that runs through their date.
-  for (const item of doseItems) {
-    const x = scale.xMid(item.start);
-    const host = spans.find((s) => !s.pause && s.xStart <= x && s.xEnd >= x);
-    const row = host ? host.row : pointRows;
-    if (!host && rowEnds.length === 0) rowEnds.push(x);
-    points.push({ item, row, y: rowY(row), x, shape: "doseMark" });
-  }
 
   const rows = Math.max(1, pointRows + rowEnds.length);
   const height = LANE_PAD_TOP + (rows - 1) * ROW_HEIGHT + LANE_PAD_BOTTOM;
@@ -585,12 +580,249 @@ export function layoutLane(
   return { key: lane.key, top, height, rows, spans, points, labels };
 }
 
+/** Air between two dose pieces of one bar, so the cut reads as a cut. */
+const SEGMENT_GAP = 1.5;
+
+/**
+ * The medications lane: one row per medication (`medication-rows.ts`),
+ * oldest first, for every medication with something inside the window.
+ * Each stretch it was taken is drawn in pieces, one per dose, a pause lies
+ * over the stretch as a gap, a one-time medication is a point and a dose
+ * change outside every stretch keeps its own mark.
+ *
+ * A medication is grouped from all its items, not only the ones inside the
+ * window: the dose of a piece that runs into the window was set by a dose
+ * change that may lie before it.
+ */
+function layoutMedicationLane(
+  key: TimelineLaneKey,
+  top: number,
+  items: readonly TimelineItem[],
+  window: TimeWindow,
+  scale: Scale,
+  options: { words: ItemWordsFn; startMissing: string; today: string },
+): LaneLayout {
+  const groups = medicationGroups(items).filter((group) =>
+    [...group.periods, ...group.points, ...group.pauses, ...group.doses].some(
+      (item) => inWindow(item, window),
+    ),
+  );
+  const rowY = (row: number) => top + LANE_PAD_TOP + row * ROW_HEIGHT;
+  const todayX = scale.x(dayNumber(options.today) + 1);
+  const endX = (end: string | null) =>
+    Math.min(scale.x1, end ? scale.x(dayNumber(end) + 1) : todayX);
+
+  const spans: PlacedSpan[] = [];
+  const points: PlacedPoint[] = [];
+  groups.forEach((group, row) => {
+    const y = rowY(row);
+    for (const period of group.periods) {
+      const pieces = doseSegments(group, period);
+      pieces.forEach((piece, i) => {
+        const rawStart = scale.x(piece.start);
+        const rawEnd = endX(piece.end);
+        if (rawStart >= scale.x1 || rawEnd <= scale.x0) return;
+        const xStart = Math.max(scale.x0, rawStart) + (i > 0 ? SEGMENT_GAP : 0);
+        spans.push({
+          item: period,
+          row,
+          y,
+          xStart,
+          xEnd: Math.min(scale.x1, Math.max(xStart + 4, rawEnd)),
+          clippedLeft: rawStart < scale.x0,
+          pause: false,
+          segment: {
+            start: piece.start,
+            end: piece.end,
+            dose: piece.dose,
+            change: piece.change,
+            first: piece.first,
+            last: piece.last,
+          },
+        });
+      });
+    }
+    for (const pause of group.pauses) {
+      if (!isSpan(pause) || !inWindow(pause, window)) continue;
+      const xStart = Math.max(scale.x0, scale.x(pause.start));
+      spans.push({
+        item: pause,
+        row,
+        y,
+        xStart,
+        xEnd: Math.max(xStart + 4, endX(pause.end)),
+        clippedLeft: false,
+        pause: true,
+      });
+    }
+    for (const point of group.points) {
+      if (!inWindow(point, window)) continue;
+      points.push({
+        item: point,
+        row,
+        y,
+        x: scale.xMid(point.start),
+        shape: "dot",
+      });
+    }
+    for (const dose of strayDoses(group)) {
+      if (!inWindow(dose, window)) continue;
+      points.push({
+        item: dose,
+        row,
+        y,
+        x: scale.xMid(dose.start),
+        shape: "doseMark",
+      });
+    }
+  });
+
+  const rows = Math.max(1, groups.length);
+  const height = LANE_PAD_TOP + (rows - 1) * ROW_HEIGHT + LANE_PAD_BOTTOM;
+  const labels = placeMedicationLabels(
+    groups,
+    spans,
+    points,
+    scale,
+    options.words,
+    options.startMissing,
+  );
+  return { key, top, height, rows, spans, points, labels };
+}
+
+/**
+ * A medication's labels: its name once per row, with the dose of the piece
+ * it stands over ("Mounjaro 2.5 mg"), above the first piece, else right of
+ * the last, else left of the first; then the dose of every later piece above
+ * where it begins ("5 mg"), then pauses and stray dose marks, each only
+ * where it fits.
+ */
+function placeMedicationLabels(
+  groups: readonly MedicationGroup[],
+  spans: readonly PlacedSpan[],
+  points: readonly PlacedPoint[],
+  scale: Scale,
+  words: ItemWordsFn,
+  startMissing: string,
+): PlacedLabel[] {
+  const occ = new LineOccupancy();
+  const line = (row: number, where: "on" | "above") => `${row}:${where}`;
+  for (const s of spans) {
+    const lead =
+      s.segment?.first && !s.item.startKnown ? UNKNOWN_START_LEAD : 0;
+    const arrow = s.item.open && (s.segment?.last ?? true) ? 7 : 0;
+    occ.add(line(s.row, "on"), s.xStart - lead, s.xEnd + arrow);
+  }
+  for (const p of points) {
+    const half = GLYPH_HALF_WIDTH[p.shape];
+    occ.add(line(p.row, "on"), p.x - half, p.x + half);
+  }
+  const labels: PlacedLabel[] = [];
+  const fits = (a: number, b: number) => a >= scale.x0 && b <= scale.x1 - 2;
+  const place = (
+    id: string,
+    row: number,
+    where: "on" | "above",
+    a: number,
+    y: number,
+    text: string,
+    margin = LABEL_MARGIN,
+  ) => {
+    const b = a + estimateTextWidth(text);
+    if (!fits(a, b) || !occ.tryAdd(line(row, where), a, b, margin)) {
+      return false;
+    }
+    labels.push({
+      itemId: id,
+      text,
+      x: a,
+      y: where === "above" ? y - 7 : y + 4,
+      strong: false,
+    });
+    return true;
+  };
+
+  groups.forEach((group, row) => {
+    const pieces = spans.filter((s) => s.row === row && !s.pause);
+    const marks = points.filter((p) => p.row === row);
+    const first = pieces[0];
+    if (first) {
+      const named = itemLine(
+        { ...first.item, label: group.label, sub: first.segment?.dose ?? null },
+        words,
+        startMissing,
+      );
+      const last = pieces[pieces.length - 1];
+      const a = first.xStart + (first.clippedLeft ? 26 : 2);
+      const placed =
+        place(first.item.id, row, "above", a, first.y, named) ||
+        place(
+          first.item.id,
+          row,
+          "on",
+          last.xEnd + 6 + (last.item.open ? 7 : 0),
+          last.y,
+          named,
+          BESIDE_MARGIN,
+        ) ||
+        place(
+          first.item.id,
+          row,
+          "on",
+          first.xStart - 6 - estimateTextWidth(named),
+          first.y,
+          named,
+          BESIDE_MARGIN,
+        );
+      // A later stretch that starts over with a dose of its own says so.
+      let shown = placed ? (first.segment?.dose ?? null) : null;
+      for (const piece of pieces.slice(1)) {
+        const dose = piece.segment?.dose ?? null;
+        if (!dose || dose === shown) continue;
+        if (place(piece.item.id, row, "above", piece.xStart + 2, piece.y, dose))
+          shown = dose;
+      }
+    } else if (marks[0]) {
+      const mark = marks[0];
+      const named = itemLine(
+        { ...mark.item, label: group.label },
+        words,
+        startMissing,
+      );
+      place(
+        mark.item.id,
+        row,
+        "on",
+        mark.x + GLYPH_HALF_WIDTH[mark.shape] + BESIDE_MARGIN + 1,
+        mark.y,
+        named,
+        BESIDE_MARGIN,
+      );
+    }
+    for (const pause of spans.filter((s) => s.row === row && s.pause)) {
+      place(
+        pause.item.id,
+        row,
+        "above",
+        pause.xStart + 2,
+        pause.y,
+        words(pause.item).label,
+      );
+    }
+    for (const mark of marks.filter((p) => p.shape === "doseMark")) {
+      const dose = words(mark.item).sub;
+      if (dose) place(mark.item.id, row, "above", mark.x + 2, mark.y, dose);
+    }
+  });
+  return labels;
+}
+
 /**
  * Labels through one occupancy map per text line. Bars and point glyphs are
  * registered first as obstacles, so a label never covers a mark either.
  *
  * Priority: open periods (they define the lane), life events, procedures,
- * closed periods from the longest down, dose marks.
+ * closed periods from the longest down.
  */
 function placeLabels(
   spans: PlacedSpan[],
@@ -607,7 +839,6 @@ function placeLabels(
     occ.add(line(s.row, "on"), s.xStart - lead, s.xEnd + (s.item.open ? 7 : 0));
   }
   for (const p of points) {
-    if (p.shape === "doseMark") continue;
     const half = GLYPH_HALF_WIDTH[p.shape];
     occ.add(line(p.row, "on"), p.x - half, p.x + half);
   }
@@ -615,11 +846,10 @@ function placeLabels(
   const labels: PlacedLabel[] = [];
   const fitsCard = (a: number, b: number) => a >= scale.x0 && b <= scale.x1 - 2;
 
-  const openSpans = spans.filter((s) => s.item.open && !s.pause);
+  const openSpans = spans.filter((s) => s.item.open);
   const closedSpans = spans
-    .filter((s) => !s.item.open && !s.pause)
+    .filter((s) => !s.item.open)
     .sort((a, b) => b.xEnd - b.xStart - (a.xEnd - a.xStart));
-  const pausesWithLabel = spans.filter((s) => s.pause);
 
   const aboveLabel = (s: PlacedSpan, text: string) => {
     const a = s.xStart + (s.clippedLeft ? 26 : 2);
@@ -696,16 +926,6 @@ function placeLabels(
       leftLabel(s.item.id, s.row, s.xStart - 6, s.y, text, strong);
     if (placed) shownOnRow.add(rowKey);
   }
-  for (const s of pausesWithLabel) aboveLabel(s, words(s.item).label);
-  for (const p of points.filter((p) => p.shape === "doseMark")) {
-    const dose = words(p.item);
-    const text = dose.sub ?? dose.label;
-    const a = p.x + 2;
-    const b = a + estimateTextWidth(text);
-    if (fitsCard(a, b) && occ.tryAdd(line(p.row, "above"), a, b)) {
-      labels.push({ itemId: p.item.id, text, x: a, y: p.y - 7, strong: false });
-    }
-  }
   // A labelled point with no room left is simply drawn without its name.
   return labels;
 }
@@ -928,8 +1148,10 @@ export function dateAtPointer(
         x >= s.xStart - 2 &&
         x <= s.xEnd + 2
       ) {
-        const startInside = s.item.start >= layout.scale.dayAt(layout.scale.x0);
-        return startInside ? s.item.start : layout.scale.dayAt(x);
+        // A dose's piece of a bar selects the day that dose began.
+        const start = s.segment?.change?.start ?? s.item.start;
+        const startInside = start >= layout.scale.dayAt(layout.scale.x0);
+        return startInside ? start : layout.scale.dayAt(x);
       }
     }
   }
@@ -963,7 +1185,10 @@ export function stepSelection(
  * since before the period (a chronic condition, a standing medication, an
  * allergy) is the backdrop of every period and is left out, as are
  * documents, which the day lists with their visit. Lane order kept. The
- * same rule holds for a week, a month and a quarter.
+ * same rule holds for a week, a month and a quarter. A medication is one
+ * entry however many of its items touch the period
+ * (`medicationPeriodItem`), so a course and its medication never read as
+ * two.
  */
 export function itemsInPeriod(
   lanes: readonly TimelineLane[],
@@ -980,6 +1205,19 @@ export function itemsInPeriod(
     if (key === "documents") continue;
     const lane = lanes.find((l) => l.key === key);
     if (!lane) continue;
+    if (key === "medications") {
+      for (const group of medicationGroups(lane.items)) {
+        const item = medicationPeriodItem(group, from, to, today);
+        if (!item) continue;
+        const end = item.open ? today : (item.end ?? item.start);
+        out.push({
+          lane: key,
+          item,
+          through: item.start < from && !item.open && end > to,
+        });
+      }
+      continue;
+    }
     for (const item of lane.items) {
       const end = item.open ? today : (item.end ?? item.start);
       if (item.start > to || end < from) continue;
diff --git a/src/components/timeline/timeline-menus.tsx b/src/components/timeline/timeline-menus.tsx
index bad95fb11..e33d583de 100644
--- a/src/components/timeline/timeline-menus.tsx
+++ b/src/components/timeline/timeline-menus.tsx
@@ -2,8 +2,12 @@
 
 /**
  * The two menus above the chart (v1.42, #613): which value lines run under
- * the lanes (at most six, the server's cap), and which lanes show, with the way back into
- * the readiness inventory ("Data coverage").
+ * the lanes, and which lanes show, with the way back into the readiness
+ * inventory ("Data coverage").
+ *
+ * The value menu is one compact button, "Values (3)". The chosen lines are
+ * not listed again beside it: each one is a named row under the lanes, and
+ * the menu marks it with its colour.
  */
 import { ChartLine, ChevronDown, Layers } from "lucide-react";
 
@@ -17,14 +21,11 @@ import {
   DropdownMenuSeparator,
   DropdownMenuTrigger,
 } from "@/components/ui/dropdown-menu";
-import { TIMELINE_MAX_SERIES, type TimelineLaneKey } from "@/lib/day/contract";
+import type { TimelineLaneKey } from "@/lib/day/contract";
 import { useTranslations } from "@/lib/i18n/context";
 
 import { TIMELINE_LANE_LABEL_KEY } from "./label-keys";
 
-/** The most value lines the chart runs under its lanes. */
-export const MAX_VALUE_SERIES = TIMELINE_MAX_SERIES;
-
 export function ValueSeriesMenu({
   options,
   selected,
@@ -40,34 +41,33 @@ export function ValueSeriesMenu({
   onChange: (next: string[]) => void;
 }) {
   const { t } = useTranslations();
-  const summary =
-    selected.length > 0
-      ? selected.map(label).join(", ")
-      : t("timeline.values.none");
   return (
     <DropdownMenu>
       <DropdownMenuTrigger asChild>
         <Button
           variant="outline"
           size="sm"
-          className="min-h-11 max-w-full sm:min-h-9"
+          className="min-h-11 sm:min-h-9"
           data-slot="timeline-values-trigger"
+          data-count={selected.length}
         >
           <ChartLine className="size-4" aria-hidden="true" />
-          <span className="truncate">{summary}</span>
+          {t("timeline.values.trigger", { count: selected.length })}
           <ChevronDown className="size-4" aria-hidden="true" />
         </Button>
       </DropdownMenuTrigger>
-      <DropdownMenuContent align="end" className="w-64">
-        <DropdownMenuLabel>{t("timeline.values.menuLabel")}</DropdownMenuLabel>
+      <DropdownMenuContent
+        align="end"
+        className="w-64"
+        data-slot="timeline-values-menu"
+      >
+        <DropdownMenuLabel>{t("timeline.values.menuTitle")}</DropdownMenuLabel>
         {options.map((key) => {
           const checked = selected.includes(key);
-          const full = !checked && selected.length >= MAX_VALUE_SERIES;
           return (
             <DropdownMenuCheckboxItem
               key={key}
               checked={checked}
-              disabled={full}
               data-slot="timeline-values-option"
               data-key={key}
               onSelect={(event) => event.preventDefault()}
diff --git a/src/components/timeline/timeline-view.tsx b/src/components/timeline/timeline-view.tsx
index a3de9ffb2..954b2a9c6 100644
--- a/src/components/timeline/timeline-view.tsx
+++ b/src/components/timeline/timeline-view.tsx
@@ -3,9 +3,10 @@
 /**
  * `/timeline` (v1.42, #613): years at a glance. Conditions, allergies,
  * medications, vaccinations, visits, documents and the person's own life
- * events in lanes, up to six value lines below them, each in its own
- * colour (`series-colors.ts`), all on one
- * time axis. Nothing on the page draws a connection between them.
+ * events in lanes, the value lines the person picks below them (as many as
+ * the record has kinds of value), each in its own colour
+ * (`series-colors.ts`), all on one time axis. Nothing on the page draws a
+ * connection between them.
  *
  * The page hands off to the day view through `?day=`: "Open 3 Jan." (and
  * Enter on the chart, a double click, a chip, a chronicle row) pushes the
@@ -17,7 +18,7 @@
  * list form of the chart. The readiness card sits on top while a lane is
  * thin and the person has not closed it; empty lanes are never drawn.
  */
-import { useMemo, useState } from "react";
+import { useCallback, useMemo, useState } from "react";
 import { usePathname, useSearchParams } from "next/navigation";
 import { CalendarRange, Plus } from "lucide-react";
 
@@ -58,13 +59,14 @@ import {
 } from "./readiness-model";
 import { TimelineReadinessSheet } from "./readiness-sheet";
 import { Segmented } from "./segmented";
-import { SERIES_FALLBACK_COLOR, assignSeriesColors } from "./series-colors";
+import { SERIES_PALETTE, assignSeriesColors } from "./series-colors";
 import { useSeriesValueFormat } from "./use-series-value-format";
 import { SelectionBar } from "./selection-bar";
 import { TimelineChart } from "./timeline-chart";
 import { TimelineChronicle } from "./timeline-chronicle";
 import { dayKey, dayNumber, todayKeyIn } from "./timeline-dates";
 import { RangeFields } from "./range-fields";
+import { RangeSheet, ZoomControl } from "./range-picker";
 import {
   clampRange,
   parseTimelineUrl,
@@ -72,11 +74,7 @@ import {
   type TimelineRange,
 } from "./timeline-url";
 import { LANE_ORDER, latestDataDate, windowFor } from "./timeline-geometry";
-import {
-  LayersMenu,
-  MAX_VALUE_SERIES,
-  ValueSeriesMenu,
-} from "./timeline-menus";
+import { LayersMenu, ValueSeriesMenu } from "./timeline-menus";
 import {
   isBoolean,
   isStringArray,
@@ -112,6 +110,21 @@ export const VALUE_OPTIONS = Object.keys(VALUE_OPTION_MODULE) as Array<
   keyof typeof VALUE_OPTION_MODULE
 >;
 
+/**
+ * Every series name the page can ask for: each measurement type, and the
+ * mood score. A stored choice outside it is dropped before it reaches the
+ * request, so a stale entry never turns the page into a 422.
+ */
+const KNOWN_SERIES: ReadonlySet<string> = new Set([
+  ...Object.keys(MEASUREMENT_TYPE_LABEL_KEYS),
+  "MOOD",
+]);
+
+/** The order colours are handed out in: the selector's own, then the rest. */
+const SERIES_RANK: readonly string[] = [
+  ...new Set([...VALUE_OPTIONS, ...KNOWN_SERIES]),
+];
+
 export const DEFAULT_VALUES = [
   "BLOOD_PRESSURE_SYS",
   "WEIGHT",
@@ -152,6 +165,7 @@ export function TimelineView() {
       : (dayParam ?? picked?.date ?? null);
   const setSelected = (date: string) => setPicked({ date, param: dayParam });
   const [readinessOpen, setReadinessOpen] = useState(false);
+  const [rangeSheetOpen, setRangeSheetOpen] = useState(false);
   const [lifeEventOpen, setLifeEventOpen] = useState(false);
   const [editing, setEditing] = useState<LifeEventDTO | null>(null);
 
@@ -172,30 +186,31 @@ export function TimelineView() {
   );
 
   const modules = user?.modules;
-  const valueOptions = useMemo(
-    () =>
-      VALUE_OPTIONS.filter((key) => {
-        const owner: ModuleKey | null = VALUE_OPTION_MODULE[key];
-        return owner === null || modules?.[owner] !== false;
-      }),
+  // What is asked for: the stored choice, minus anything unknown and minus
+  // a line whose module is off. The server narrows it further to what the
+  // caller may see.
+  const allowed = useCallback(
+    (key: string) => {
+      if (!KNOWN_SERIES.has(key)) return false;
+      const owner: ModuleKey | null | undefined =
+        VALUE_OPTION_MODULE[key as keyof typeof VALUE_OPTION_MODULE];
+      return !owner || modules?.[owner] !== false;
+    },
     [modules],
   );
   const values = useMemo(
-    () =>
-      storedValues
-        .filter((v) => (valueOptions as readonly string[]).includes(v))
-        .slice(0, MAX_VALUE_SERIES),
-    [storedValues, valueOptions],
+    () => storedValues.filter(allowed),
+    [storedValues, allowed],
   );
   // One colour per chosen line, shared by the chart, the selection bar, the
   // menu and the phone chronicle; contested colours go by the menu's order.
   const seriesColors = useMemo(
-    () => assignSeriesColors(values, VALUE_OPTIONS),
+    () => assignSeriesColors(values, SERIES_RANK),
     [values],
   );
   const seriesFormat = useSeriesValueFormat();
   const seriesColor = (key: string) =>
-    seriesColors.get(key) ?? SERIES_FALLBACK_COLOR;
+    seriesColors.get(key) ?? SERIES_PALETTE[0];
   const hidden = useMemo(
     () => new Set(hiddenList as TimelineLaneKey[]),
     [hiddenList],
@@ -257,17 +272,8 @@ export function TimelineView() {
     window.history.pushState(null, "", `${pathname}${search}`);
   }
 
-  function setZoom(next: TimelineZoom) {
-    if (next !== "range") {
-      navigate(next, null);
-      return;
-    }
-    // A new range starts as what is on screen, up to today.
-    const shown = window_ ?? {
-      from: dayKey(dayNumber(today) - 29),
-      to: today,
-    };
-    navigate("range", clampRange(shown, today, data?.range.dataFrom ?? null));
+  function setZoom(next: Exclude<TimelineZoom, "range">) {
+    navigate(next, null);
   }
 
   // The shell's day layer owns `?day=` and its history entries; this only
@@ -302,6 +308,23 @@ export function TimelineView() {
         zoom === "all" || zoom === "range" ? data.range : null,
       )
     : null;
+  // A new range starts as the chosen one, or as what is on screen, up to
+  // today.
+  const rangeDraft = clampRange(
+    range ??
+      window_ ?? {
+        from: dayKey(dayNumber(today) - 29),
+        to: today,
+      },
+    today,
+    data?.range.dataFrom ?? null,
+  );
+  // The selector offers every series the record has, the chosen ones kept
+  // even when they have nothing yet, in the selector's order and then the
+  // record's.
+  const valueOptions = [
+    ...new Set([...(data?.availableSeries ?? []).filter(allowed), ...values]),
+  ].sort((a, b) => SERIES_RANK.indexOf(a) - SERIES_RANK.indexOf(b));
   const presentLanes = (data?.lanes ?? [])
     .filter((l) => l.items.length > 0)
     .map((l) => l.key)
@@ -338,27 +361,17 @@ export function TimelineView() {
     </Button>
   ) : null;
 
-  // The chosen range's fields, under the zoom; on a phone with a way back to
-  // the whole record, since the phone has no zoom control to switch with.
-  const rangeControls =
+  // A chosen stretch with nothing in it keeps its fields on the page, so the
+  // next choice is one step away; everywhere else they open in a popover
+  // (or a sheet on a phone) and never push the chart down.
+  const emptyRangeFields =
     zoom === "range" && range ? (
-      <div className="flex flex-wrap items-end gap-3">
-        <RangeFields
-          range={range}
-          today={today}
-          dataFrom={data?.range.dataFrom ?? null}
-          onChange={(next) => navigate("range", next)}
-        />
-        <Button
-          variant="outline"
-          size="sm"
-          className="min-h-11 sm:min-h-10 md:hidden"
-          onClick={() => setZoom("all")}
-          data-slot="timeline-range-clear"
-        >
-          {t("timeline.range.clear")}
-        </Button>
-      </div>
+      <RangeFields
+        range={range}
+        today={today}
+        dataFrom={data?.range.dataFrom ?? null}
+        onChange={(next) => navigate("range", next)}
+      />
     ) : null;
 
   const layers = (iconOnly: boolean) => (
@@ -408,7 +421,7 @@ export function TimelineView() {
         // A chosen stretch with nothing in it: the fields stay, so the next
         // choice is one step away.
         <div className="space-y-4" data-slot="timeline-range-empty">
-          {rangeControls}
+          {emptyRangeFields}
           <EmptyState
             title={t("timeline.selection.empty")}
             action={
@@ -435,14 +448,20 @@ export function TimelineView() {
           <div
             className="hidden space-y-4 md:block"
             data-slot="timeline-desktop"
+            data-zoom={zoom}
+            data-from={range?.from}
+            data-to={range?.to}
           >
             <div className="flex flex-wrap items-center justify-between gap-3">
-              <Segmented
+              <ZoomControl
                 options={zoomOptions}
-                value={zoom}
-                onChange={setZoom}
+                zoom={zoom}
                 label={t("timeline.zoomLabel")}
-                slot="timeline-zoom"
+                initialRange={rangeDraft}
+                today={today}
+                dataFrom={data.range.dataFrom}
+                onZoom={setZoom}
+                onApply={(next) => navigate("range", next)}
               />
               <div className="flex min-w-0 flex-wrap items-center gap-2">
                 <ValueSeriesMenu
@@ -455,7 +474,6 @@ export function TimelineView() {
                 {layers(false)}
               </div>
             </div>
-            {rangeControls}
             <Card className="md:gap-4">
               <CardContent className="space-y-4">
                 <TimelineChart
@@ -482,7 +500,7 @@ export function TimelineView() {
                   onOpenDay={openDay}
                   onEditLifeEvent={canAddLifeEvent ? editLifeEvent : undefined}
                 />
-                <Legend
+                <TimelineLegend
                   bucket={data.bucket}
                   hasSeries={data.series.length > 0}
                 />
@@ -491,7 +509,13 @@ export function TimelineView() {
           </div>
 
           {/* Phone: the chronicle. */}
-          <div className="space-y-4 md:hidden" data-slot="timeline-mobile">
+          <div
+            className="space-y-4 md:hidden"
+            data-slot="timeline-mobile"
+            data-zoom={zoom}
+            data-from={range?.from}
+            data-to={range?.to}
+          >
             <div className="flex items-center justify-between gap-3">
               <Segmented
                 options={groupingOptions}
@@ -507,7 +531,7 @@ export function TimelineView() {
                   className="size-11"
                   aria-label={t("timeline.range.open")}
                   aria-pressed={zoom === "range"}
-                  onClick={() => setZoom(zoom === "range" ? "all" : "range")}
+                  onClick={() => setRangeSheetOpen(true)}
                   data-slot="timeline-range-toggle"
                 >
                   <CalendarRange className="size-4" aria-hidden="true" />
@@ -515,7 +539,15 @@ export function TimelineView() {
                 {layers(true)}
               </div>
             </div>
-            {rangeControls}
+            <RangeSheet
+              open={rangeSheetOpen}
+              onOpenChange={setRangeSheetOpen}
+              initialRange={rangeDraft}
+              today={today}
+              dataFrom={data.range.dataFrom}
+              onApply={(next) => navigate("range", next)}
+              onClear={zoom === "range" ? () => setZoom("all") : null}
+            />
             <TimelineChronicle
               timeline={{
                 ...data,
@@ -549,7 +581,14 @@ export function TimelineView() {
   );
 }
 
-function Legend({
+/**
+ * What the marks mean. Under the selection bar and set off from it by a
+ * hairline. With value lines, the two marks a line can carry besides its
+ * points are explained by an example of each: the dashed stroke over a short
+ * gap without measurements, and the hollow point of a mean resting on fewer
+ * than three.
+ */
+export function TimelineLegend({
   bucket,
   hasSeries,
 }: {
@@ -559,7 +598,7 @@ function Legend({
   const { t } = useTranslations();
   return (
     <div
-      className="text-muted-foreground flex flex-wrap items-center gap-x-4 gap-y-1.5 text-xs"
+      className="text-muted-foreground border-border flex flex-wrap items-center gap-x-4 gap-y-1.5 border-t pt-3 text-xs"
       data-slot="timeline-legend"
     >
       <span className="inline-flex items-center gap-1.5">
@@ -586,11 +625,50 @@ function Legend({
             <span className="bg-foreground h-0.5 w-4" aria-hidden="true" />
             {t(TIMELINE_LEGEND_MEAN_KEY[bucket])}
           </span>
-          <span className="inline-flex items-center gap-1.5">
-            <span
-              className="border-foreground bg-card size-2 rounded-full border"
+          <span
+            className="inline-flex items-center gap-1.5"
+            data-slot="timeline-legend-gap"
+          >
+            <svg
+              width="16"
+              height="8"
+              viewBox="0 0 16 8"
+              className="text-foreground"
               aria-hidden="true"
-            />
+            >
+              <line
+                x1="1"
+                x2="15"
+                y1="4"
+                y2="4"
+                stroke="currentColor"
+                strokeWidth="1.2"
+                strokeDasharray="3 3"
+                strokeLinecap="round"
+              />
+            </svg>
+            {t("timeline.legendGap")}
+          </span>
+          <span
+            className="inline-flex items-center gap-1.5"
+            data-slot="timeline-legend-thin"
+          >
+            <svg
+              width="8"
+              height="8"
+              viewBox="0 0 8 8"
+              className="text-foreground"
+              aria-hidden="true"
+            >
+              <circle
+                cx="4"
+                cy="4"
+                r="2.75"
+                fill="var(--card)"
+                stroke="currentColor"
+                strokeWidth="1.4"
+              />
+            </svg>
             {t("timeline.legendThin")}
           </span>
         </>
diff --git a/src/lib/day/contract.ts b/src/lib/day/contract.ts
index 300189abb..4586f6bf3 100644
--- a/src/lib/day/contract.ts
+++ b/src/lib/day/contract.ts
@@ -274,13 +274,6 @@ export const TIMELINE_RANGE_MAX_DAYS = 15 * 366;
 
 export type TimelineBucket = (typeof TIMELINE_BUCKETS)[number];
 
-/**
- * The most value series one request may name. Each series is its own row
- * under the lanes, drawn in neutral ink and labelled at the left, so the cap
- * is the chart's height, not a palette: six rows add 360 px under the lanes.
- */
-export const TIMELINE_MAX_SERIES = 6;
-
 /**
  * The lanes, top to bottom. An empty lane is not sent. Each lane a module
  * owns is a surface (`timeline-lane:<key>`) and disappears with it.
@@ -288,7 +281,9 @@ export const TIMELINE_MAX_SERIES = 6;
  *   life         life events, and travel periods from the environment module
  *   illness      episodes, chronic conditions as open lines
  *   allergies    allergies with an onset; the rest are `standing`
- *   medications  medications and courses, dose marks, pauses as gaps
+ *   medications  medications and courses, dose marks, pauses as gaps; every
+ *                item of one medication carries its id as `group`, and a
+ *                client draws a group on one row
  *   vaccinations doses
  *   visits       visits and procedures
  *   labs         days with results
diff --git a/src/lib/day/wire-schemas.ts b/src/lib/day/wire-schemas.ts
index d91ecb623..1866a89d9 100644
--- a/src/lib/day/wire-schemas.ts
+++ b/src/lib/day/wire-schemas.ts
@@ -327,7 +327,7 @@ export const timelineQuerySchema = z
       .string()
       .optional()
       .describe(
-        "Comma-separated value series to include, as `MeasurementType` names or `MOOD`, at most 6. More, or an unknown name, answers 422.",
+        "Comma-separated value series to include, as `MeasurementType` names or `MOOD`. A name given twice counts once, so the list is bounded by the names that exist; an unknown name answers 422.",
       ),
   })
   .refine((q) => q.zoom !== "range" || (q.from && q.to), {
@@ -376,6 +376,12 @@ const timelineItem = z
         "The second line, by kind: a code for a life event (its category), a visit or procedure (its encounter kind) and a document (its kind); the analyte count for a lab day; the dose as text for a medication or a dose change. The client words every code.",
       ),
     href: z.string().nullable(),
+    group: z
+      .string()
+      .nullable()
+      .describe(
+        "Items that belong to one thing share a group and are drawn on one row: a medication's own span, its courses, its dose changes and its pauses all carry the medication's id. Null for an item that stands alone.",
+      ),
   })
   .meta({ id: "TimelineItem" });
 
@@ -442,6 +448,11 @@ export const timelineResponseSchema = z
         "The span every series point averages: `quarter` for a multi-year `all`, `month` for `year` and an `all` under two years, `week` for `quarter`, and for a `range` by its length: `quarter` from two years, `month` from 120 days, `week` from 42 days, `day` below.",
       ),
     series: z.array(timelineSeries),
+    availableSeries: z
+      .array(z.string())
+      .describe(
+        "Every value series this record can show, whatever the window: the `MeasurementType` names with live readings that the caller may see (events excluded), and `MOOD` when the mood score is visible and has entries. Each may be named in `values`.",
+      ),
     notable: z.array(
       z.object({ date: dateKeySchema, kind: z.enum(DAY_NOTABLE_KINDS) }),
     ),
diff --git a/src/lib/timeline/__tests__/series.test.ts b/src/lib/timeline/__tests__/series.test.ts
index f3b985d54..9801e5142 100644
--- a/src/lib/timeline/__tests__/series.test.ts
+++ b/src/lib/timeline/__tests__/series.test.ts
@@ -121,17 +121,29 @@ describe("window", () => {
     expect(parseSeriesKeys("WEIGHT,DROP TABLE")).toBeNull();
   });
 
-  it("accepts up to six series and refuses a seventh", () => {
-    const six = [
+  it("has no cap on the count: every known series, each once", () => {
+    const many = [
       "BLOOD_PRESSURE_SYS",
       "BLOOD_PRESSURE_DIA",
       "WEIGHT",
       "PULSE",
       "MOOD",
       "BODY_FAT",
+      "BLOOD_GLUCOSE",
+      "SLEEP_DURATION",
+      "ACTIVITY_STEPS",
+      "RESTING_HEART_RATE",
+      "HEART_RATE_VARIABILITY",
+      "OXYGEN_SATURATION",
+      "BODY_TEMPERATURE",
+      "VO2_MAX",
+      "RESPIRATORY_RATE",
     ];
-    expect(parseSeriesKeys(six.join(","))).toEqual(six);
-    expect(parseSeriesKeys([...six, "BLOOD_GLUCOSE"].join(","))).toBeNull();
+    expect(parseSeriesKeys(many.join(","))).toEqual(many);
+    // A name given twice counts once, so the list is bounded by the names
+    // that exist.
+    expect(parseSeriesKeys([...many, ...many].join(","))).toEqual(many);
+    expect(parseSeriesKeys([...many, "NOPE"].join(","))).toBeNull();
   });
 });
 
diff --git a/src/lib/timeline/lanes.ts b/src/lib/timeline/lanes.ts
index da037607a..f35f91489 100644
--- a/src/lib/timeline/lanes.ts
+++ b/src/lib/timeline/lanes.ts
@@ -10,6 +10,13 @@
  * pretend. Something with no date at all is not drawn on the axis; it is
  * listed once under `standing`.
  *
+ * A medication is read from four tables (its own start and end, its
+ * courses, its dose changes, its pauses), so it arrives as several items.
+ * They share the medication's id as `group`, and a client draws one row per
+ * group: the courses are the stretches it was taken, the dose changes cut
+ * them into segments, and a pause is a gap in the same bar. Drawn item by
+ * item, one medication with a course read as two medications.
+ *
  * Each lane belongs to one sharing domain and, where a module owns it, to
  * that module; a lane the caller may not see is not read. The `life` lane
  * holds life events (the timeline module's own content) and travel periods
@@ -82,15 +89,18 @@ interface LaneFrame {
   access: TimelineAccess;
 }
 
+type ItemDefaults = "precision" | "startKnown" | "sub" | "href" | "group";
+
 function item(
-  rest: Omit<TimelineItem, "precision" | "startKnown" | "sub" | "href"> &
-    Partial<Pick<TimelineItem, "precision" | "startKnown" | "sub" | "href">>,
+  rest: Omit<TimelineItem, ItemDefaults> &
+    Partial<Pick<TimelineItem, ItemDefaults>>,
 ): TimelineItem {
   return {
     precision: "DAY",
     startKnown: true,
     sub: null,
     href: null,
+    group: null,
     ...rest,
   };
 }
@@ -308,6 +318,7 @@ async function medicationsLane(frame: LaneFrame): Promise<LaneRead> {
         label: med.name,
         sub: med.dose,
         href,
+        group: med.id,
       }),
     );
   }
@@ -322,6 +333,7 @@ async function medicationsLane(frame: LaneFrame): Promise<LaneRead> {
         open: end === null,
         label: c.medication.name,
         href: `/medications/${c.medicationId}`,
+        group: c.medicationId,
       }),
     );
   }
@@ -336,6 +348,7 @@ async function medicationsLane(frame: LaneFrame): Promise<LaneRead> {
         label: d.medication.name,
         sub: `${d.doseValue} ${d.doseUnit}`,
         href: `/medications/${d.medicationId}/history`,
+        group: d.medicationId,
       }),
     );
   }
@@ -350,6 +363,7 @@ async function medicationsLane(frame: LaneFrame): Promise<LaneRead> {
         open: end === null,
         label: p.medication.name,
         href: `/medications/${p.medicationId}`,
+        group: p.medicationId,
       }),
     );
   }
diff --git a/src/lib/timeline/load-timeline.ts b/src/lib/timeline/load-timeline.ts
index a24ef1a97..e9d14117b 100644
--- a/src/lib/timeline/load-timeline.ts
+++ b/src/lib/timeline/load-timeline.ts
@@ -19,7 +19,6 @@ import type { MeasurementType } from "@/generated/prisma/enums";
 import {
   DAY_NOTABLE_MAX_SPAN_DAYS,
   TIMELINE_LANE_KEYS,
-  TIMELINE_MAX_SERIES,
   type TimelineBucket,
   type TimelineItem,
   type TimelineQuery,
@@ -29,6 +28,7 @@ import {
 import { loadNotableRange } from "@/lib/day/notable";
 import { measurementTypeVisible } from "@/lib/day/sections";
 import { prisma } from "@/lib/db";
+import { listLiveMeasurementTypes } from "@/lib/measurements/live-types";
 import { loadUserSourcePriority } from "@/lib/rollups/measurement-read";
 import {
   LANE_READERS,
@@ -38,6 +38,7 @@ import {
 } from "@/lib/timeline/lanes";
 import { loadTimelineSeries, MOOD_SERIES_KEY } from "@/lib/timeline/series";
 import { daysBetweenDateKeys, shiftDateKey, userDayKey } from "@/lib/tz/format";
+import { EVENT_MEASUREMENT_TYPES } from "@/lib/validations/measurement";
 
 /** The series sent when the request names none. */
 export const DEFAULT_TIMELINE_SERIES: readonly MeasurementType[] = [
@@ -105,8 +106,9 @@ const MEASUREMENT_TYPE_SET: ReadonlySet<string> = new Set(
 
 /**
  * The series keys a `values` parameter names, or null when one is not a
- * series this API knows or there are more than {@link TIMELINE_MAX_SERIES}
- * (the route answers 422).
+ * series this API knows (the route answers 422). There is no cap on the
+ * count: a name given twice counts once, so the list never grows past the
+ * names that exist, and each series is its own row under the lanes.
  */
 export function parseSeriesKeys(raw: string | undefined): string[] | null {
   if (raw === undefined) return [...DEFAULT_TIMELINE_SERIES];
@@ -118,13 +120,47 @@ export function parseSeriesKeys(raw: string | undefined): string[] | null {
         .filter((k) => k.length > 0),
     ),
   ];
-  if (keys.length > TIMELINE_MAX_SERIES) return null;
   for (const key of keys) {
     if (key !== MOOD_SERIES_KEY && !MEASUREMENT_TYPE_SET.has(key)) return null;
   }
   return keys;
 }
 
+/**
+ * Every series the record can show, whatever the window: the measurement
+ * types with live readings the caller may see, events left out (they are
+ * occurrences, not values a mean can be taken of), and the mood score when
+ * it is visible and has an entry. Measurement types come in the enum's
+ * order, mood last.
+ */
+export async function loadAvailableSeries(args: {
+  recordId: string;
+  access: TimelineAccess;
+}): Promise<string[]> {
+  const { recordId, access } = args;
+  const moodVisible =
+    access.modules.mood !== false && access.domainVisible("mind");
+  const [types, mood] = await Promise.all([
+    access.domainVisible("measurements")
+      ? listLiveMeasurementTypes(recordId)
+      : Promise.resolve([] as MeasurementType[]),
+    moodVisible
+      ? prisma.moodEntry.findFirst({
+          where: { userId: recordId, deletedAt: null },
+          select: { id: true },
+        })
+      : Promise.resolve(null),
+  ]);
+  return [
+    ...types.filter(
+      (type) =>
+        !EVENT_MEASUREMENT_TYPES.has(type) &&
+        measurementTypeVisible(type, access.modules),
+    ),
+    ...(mood ? [MOOD_SERIES_KEY] : []),
+  ];
+}
+
 /** Whether an item touches `[from, to]`. An open span runs up to today. */
 export function overlaps(
   item: Pick<TimelineItem, "start" | "end" | "open">,
@@ -201,7 +237,7 @@ export async function loadTimeline(args: {
       ? shiftDateKey(to, -(DAY_NOTABLE_MAX_SPAN_DAYS - 1))
       : from;
   const bucket = timelineBucket(query.zoom, from, to);
-  const [series, notable] = await Promise.all([
+  const [series, notable, availableSeries] = await Promise.all([
     loadTimelineSeries({
       userId: recordId,
       keys: seriesKeys,
@@ -223,6 +259,7 @@ export async function loadTimeline(args: {
           gaps: false,
         })
       : Promise.resolve([]),
+    loadAvailableSeries({ recordId, access }),
   ]);
 
   return {
@@ -232,6 +269,7 @@ export async function loadTimeline(args: {
     standing,
     bucket,
     series,
+    availableSeries,
     notable: notable.map(({ date, kind }) => ({ date, kind })),
   };
 }
diff --git a/tests/integration/day-view.test.ts b/tests/integration/day-view.test.ts
index 68128f087..54d24df0d 100644
--- a/tests/integration/day-view.test.ts
+++ b/tests/integration/day-view.test.ts
@@ -969,22 +969,182 @@ describe("timeline", () => {
       ).toBe(422);
     }
 
-    const six =
-      "BLOOD_PRESSURE_SYS,BLOOD_PRESSURE_DIA,WEIGHT,PULSE,BODY_FAT,MOOD";
+    // No cap on the count: seven, and an unknown name still refused.
+    const seven =
+      "BLOOD_PRESSURE_SYS,BLOOD_PRESSURE_DIA,WEIGHT,PULSE,BODY_FAT,MOOD,BLOOD_GLUCOSE";
     expect(
-      (await call(GET as Handler, "GET", `/api/timeline?values=${six}`)).status,
+      (await call(GET as Handler, "GET", `/api/timeline?values=${seven}`))
+        .status,
     ).toBe(200);
     expect(
-      (
-        await call(
-          GET as Handler,
-          "GET",
-          `/api/timeline?values=${six},BLOOD_GLUCOSE`,
-        )
-      ).status,
+      (await call(GET as Handler, "GET", `/api/timeline?values=${seven},NOPE`))
+        .status,
     ).toBe(422);
   });
 
+  it("tags every item of one medication with its id, so it draws on one row", async () => {
+    const db = getPrismaClient();
+    const owner = await makeUser("tl-group", { timeline: true });
+    const med = await db.medication.create({
+      data: {
+        userId: owner.id,
+        name: "Mounjaro",
+        dose: "7.5 mg",
+        startsOn: dayKeyAsUtcMidnight("2026-01-05"),
+      },
+    });
+    const other = await db.medication.create({
+      data: {
+        userId: owner.id,
+        name: "Ramipril",
+        dose: "5 mg",
+        startsOn: dayKeyAsUtcMidnight("2025-06-01"),
+      },
+    });
+    await db.medicationCourse.create({
+      data: {
+        userId: owner.id,
+        medicationId: med.id,
+        startsOn: dayKeyAsUtcMidnight("2026-01-05"),
+      },
+    });
+    await db.medicationDoseChange.createMany({
+      data: [
+        {
+          medicationId: med.id,
+          effectiveFrom: new Date("2026-01-05T08:00:00.000Z"),
+          doseValue: 2.5,
+          doseUnit: "mg",
+        },
+        {
+          medicationId: med.id,
+          effectiveFrom: new Date("2026-02-02T08:00:00.000Z"),
+          doseValue: 5,
+          doseUnit: "mg",
+        },
+      ],
+    });
+    await db.medicationPauseEra.create({
+      data: {
+        userId: owner.id,
+        medicationId: med.id,
+        pausedAt: new Date("2026-03-01T08:00:00.000Z"),
+        resumedAt: new Date("2026-03-10T08:00:00.000Z"),
+      },
+    });
+    await signIn(owner.id);
+
+    const { GET } = await import("@/app/api/timeline/route");
+    const timeline = await json<import("@/lib/day/contract").TimelineResponse>(
+      await call(
+        GET as Handler,
+        "GET",
+        "/api/timeline?zoom=year&to=2026-03-31",
+      ),
+    );
+    const items = timeline.lanes.find((l) => l.key === "medications")!.items;
+    const byGroup = new Map<string | null, string[]>();
+    for (const i of items) {
+      byGroup.set(i.group, [...(byGroup.get(i.group) ?? []), i.kind]);
+    }
+    // Six items, two medications: Mounjaro's own span, its course, its
+    // two dose changes and its pause all carry its id.
+    expect(items).toHaveLength(6);
+    expect([...byGroup.keys()].sort()).toEqual([med.id, other.id].sort());
+    expect(byGroup.get(med.id)!.sort()).toEqual(
+      ["course", "doseChange", "doseChange", "medication", "pause"].sort(),
+    );
+    expect(byGroup.get(other.id)).toEqual(["medication"]);
+    expect(
+      items.find((i) => i.kind === "doseChange" && i.start === "2026-02-02"),
+    ).toMatchObject({ label: "Mounjaro", sub: "5 mg", group: med.id });
+  });
+
+  it("offers every value series the record has, and answers fifteen at once", async () => {
+    const db = getPrismaClient();
+    const owner = await makeUser("tl-many", {
+      timeline: true,
+      mood: true,
+      glucose: true,
+      recovery: true,
+    });
+    const types = [
+      "BLOOD_PRESSURE_SYS",
+      "BLOOD_PRESSURE_DIA",
+      "WEIGHT",
+      "PULSE",
+      "BODY_FAT",
+      "BLOOD_GLUCOSE",
+      "ACTIVITY_STEPS",
+      "OXYGEN_SATURATION",
+      "HEART_RATE_VARIABILITY",
+      "BODY_TEMPERATURE",
+      "VO2_MAX",
+      "RESPIRATORY_RATE",
+      "MUSCLE_MASS",
+      "BONE_MASS",
+    ] as const;
+    // A reading a day for a year, every type: about five thousand rows.
+    const rows = [];
+    for (const [i, type] of types.entries()) {
+      for (let d = 0; d < 365; d++) {
+        const at = new Date(Date.UTC(2025, 3, 1 + d, 7, i));
+        rows.push({
+          userId: owner.id,
+          type,
+          value: 50 + (d % 30) + i,
+          unit: "x",
+          measuredAt: at,
+        });
+      }
+    }
+    await db.measurement.createMany({ data: rows });
+    // An event type is an occurrence, not a value: never offered.
+    await db.measurement.create({
+      data: {
+        userId: owner.id,
+        type: "HIGH_HEART_RATE_EVENT",
+        value: 1,
+        unit: "count",
+        measuredAt: new Date("2026-01-10T07:00:00.000Z"),
+      },
+    });
+    await db.moodEntry.create({
+      data: {
+        userId: owner.id,
+        date: "2026-01-10",
+        score: 4,
+        mood: "GUT",
+        moodLoggedAt: new Date("2026-01-10T19:00:00.000Z"),
+      },
+    });
+    await signIn(owner.id);
+
+    const { GET } = await import("@/app/api/timeline/route");
+    const values = [...types, "MOOD"].join(",");
+    expect(values.split(",")).toHaveLength(15);
+    const started = performance.now();
+    const res = await call(
+      GET as Handler,
+      "GET",
+      `/api/timeline?zoom=year&to=2026-03-31&values=${values}`,
+    );
+    const took = performance.now() - started;
+    const timeline =
+      await json<import("@/lib/day/contract").TimelineResponse>(res);
+    expect(timeline.series).toHaveLength(15);
+    expect(timeline.series.every((s) => s.points.length > 0)).toBe(true);
+    expect(timeline.availableSeries).toEqual(
+      expect.arrayContaining([...types, "MOOD"]),
+    );
+    expect(timeline.availableSeries).toHaveLength(15);
+    expect(timeline.availableSeries).not.toContain("HIGH_HEART_RATE_EVENT");
+    // Fifteen series over a year of daily readings answer in about a tenth
+    // of a second against the test database; the bound is generous so a
+    // slow runner does not fail it, and still catches a read gone quadratic.
+    expect(took).toBeLessThan(5_000);
+  });
+
   it("averages quarters over the years, live before the fold window and rolled up after it", async () => {
     const db = getPrismaClient();
     const owner = await makeUser("tl-quarters", { timeline: true });