I was trying to set a picture in the Pictures folder as the desktop background on my Fedora 30 Workstation (Gnome). However, even though there are quite a few, in “Settings > Background > Pictures”, it says that it can’t find any.
Would anyone know what the requirements of these pictures are? Should they be a particular size, and format, for example?
Interestingly, the background dialog itself shows only some (rather small) subset of images from Pictures folder and gives user no option to add/select a specific file – that’s quite strange behavior, i’d say.
Gnome itself (trying to be as simple as possible?) doesn’t provide any hints on which picture files does it choose: help.gnome.org
It also offers to use right-click from Files/Nautilus or menu entry from Image Viewer application to use specific picture as wallpaper.