Hello all, I fully agree that LO should have a shortcut for a night / reader mode to get out of the white page background that hurt the eye, without changing the actual output (i.e. without changing the actual colour of the page). Achieving this is doable fairly easily though (in LO 6.0+) by going to Tool → Options → LibreOffice → Application colours → Document Background and change the colour there (this will keep the page white if you print it or export it.
I found the answer there: How do I set the paper color in LibreOffice Writer? - Super User
Still a button / obvious shortcut for that function would be good!
Everything else on my desktop is themed dark to help my old eyes except LO. If I wander through dozens of settings I can make a dark theme. So why can’t I have a single button that does that for me? Surely whether it’s one setting or dozens has nothing to do with whether the page preview looks white or not … this is a matter of UX, not printed page.