Red Hat uses Gnome, and the default file manager is Nautilus, which does allow you to pick a background. I was not enamored of the feature because it did not seem to include the left sidebar, just the main window.
I just happen to have OpenSUSE running in a VM, so I took a quick look at Dolphin. I might have missed it, but I saw nothing under the "Configure Dolphin" item that referred to a background. In any event, Control-->Configure Dolphin would be the place to look.
|