Kysyin asiasta kehittäjiltä ja sain vastauksen:
"An ODF document does not include configuration data for the window of the
editor to be used to open it; it doesn't "work that way".
Window dimensions are something which your desktop environment (may) choose to persist.
Also, remember an LO window is not like the frame of a photograph; it's an _editor_ for documents rather than a display showcase.
So, for the most part, it does not make much sense for the window dimensions to match the document somehow."
Täytyypä selvitellä miksi ja milloin olen joutunut sellaiseen käsitykseen, että olisi aiemmin toiminut toisin.