Today's daft question.
Why can't you automatically centre up a text box on the page in Writer?
If I have an image, I do R-click, Alignment, and pick from a useful selection of options.
Try the same on a text box and I get "<no selection possible>".
It makes laying out a page (and I've just started on an order of service for a funeral) decidedly frustrating.
(Nor for that matter do styles work in a text box. I fail to understand the issues here.)
(LO 5.1.6.2/Mint, BTW)