Word's Text Direction and LibreOffice's, on the frame's own toolbar: the
browser lays the vertical flow out, so the box needs nothing but the mode.
ODF keeps it in the frame style's *paragraph* properties — probed: in the
graphic properties LibreOffice drops it, there it keeps it and lays the box
out — and Word in the shape body's `vert`, the VML fallback's
`layout-flow:vertical` read too. Both survive a LibreOffice re-save.
Steffen Becker
c800618299