Word's positionH never counts from the anchor character, and the page a
frame lands on changes as pagination inserts spacers above it. placeFromPage
measures the frame's static position and turns both offsets into the margins
that reach the page corner — x from the text column, y from the page top —
and every pagination pass re-places them. A run-through text box can now sit
in front of the text (inFront) instead of always behind it.