I googled this & found info saying: go to View- “styles and Formatting”, but that selection does not exist under my View tab. Seems something so basic should not be so hard to do!
But you haven’t even told which application (Writer/Calc/Draw/Impress/Base form) you are working with!
Try this - Right click anyplace on the page, at the bottom of the context menu is Page. . . Select that and a window for page formatting should appear. Select the Page tab and change the format to your desires. Orientation for either Portrait or landscape.
You can also reach this via the Format selection in the top menu.
Thanks, but I’ve tried both & neither works.
Do not answer your own question unless it is a real answer (and yours is not). Use the comment option.