When executing Activities → Settings → Background, you can find three background tabs: [Wallpapers] [Pictures] [Colors] In [Wallpapers] you can find backgrounds under /usr/share/backgrounds/, but ...
I am using Debian Testing and Gnome Flashback (but it behaves the same in standard Gnome Shell). It gives me plain white background, and I can't set my own. Also, the settings dialog for background ...
Is it possible to change the GNOME desktop background during some period of time by just a random phrase from the list on black screen? Will is seriously load the CPU and consume battery life?