I use Ubuntu 22.04.3 and just upgraded LO to version 7.6 Flatpak. The normal page boundary outline has disappeared. Is this a bug or am I missing something? I have changed screen colour to black which provides the page outline but would prefer to revert to the normal white screen layout.
It might not be picking up System Theme properly if you use KDE, see Bug 149611 - Page color doesn’t adhere to dark theme (kf5)
You could click Tools > Options > LibreOffice > Application Colours and change Application background from Automatic to a contrasting colour.
Thanks for advice but it only partly works. If I change the background colour to Magenta, I achieve a white page, which is fine but it only operates on the specific open file. If I open a new file or an existing file there is no Magenta background. Magenta only appears surrounding the horizontal ruler above the page! The page background is white; the ruler is white (and black); and the ruler is surrounded left right top and bottom with Magenta - bit like a letter box.
Did you close LibreOffice completely and re-open? If I change to magenta, close LO and open then new and existing files will have magenta surround to document.
If you don’t get that after restarting LO then you should post a bug report, remember to include details of your system. Click Help > About LibreOffice and click the icon just after the words Version Information to copy it all to clipboard. See How to Report Bugs in LibreOffice - The Document Foundation Wiki
Don’t forget to provide link to bug report back here.
Thanks again. After messing around (in other words not quite sure how I managed it) the result was as you indicated. When checking further I realised I had two versions of LO - 7.5 and 7.6 - and the 7.5 version showed the normal faint line showing the page outline. I have removed the second version but while the colour solution answers the problem, it does not explain why the page outline suddenly disappeared in release 7.6. I have been using LO pretty much since it’s inception and it is good to see the continual improvement, notwithstanding this particular glitch.