Windows keeps reverting my Wallpaper Settings

Here's Microsoft solution that seems to be working for me. I'll update this post once I reboot to see if it sticks in there.

1. Go to: Settings > Personalization > Background Set Personalize your background to Picture, then click Browse and select your image from a permanent folder like: C:\Wallpapers\MyImage.jpgAvoid using images from Downloads or external drives.
2. Next, go to: Settings > Personalization > ThemesClick Save theme to lock in your current setup. Name it something like “StaticWallpaperFix”.
3. Now disable sync to prevent Windows from reverting your theme: Settings > Accounts > Windows backup > Remember my preferencesTurn Off “Other Windows settings”.
4. Finally, open Run (Win + R), type: %USERPROFILE%\AppData\Roaming\Microsoft\Windows\Themes\. Delete any leftover slideshow.ini or corrupted theme files. This clears out old slideshow triggers.

Source 

 

Change the Default Paper Size in Fedora Linux

 The quick way:

Change directory to /etc/cups/ppd.

There you should find a file for your printer.

Edit it and find the line:

 *DefaultPageSize: A4

The list of supported sizes is below that line. Make sure you set the default to one of those.