This wallpaper only affects the Riva COS source - the default Android interface.
Instructions
-
Open the Quick Menu by pressing the physical button at the bottom of the screen.
-
Press on Settings, this will look like a cogwheel icon
-
Navigate to General > Set up wallpaper
-
You will see your currently active wallpaper in full screen, and a selection of wallpapers at the bottom of the screen.
-
-
Choose a wallpaper you wish to use by tapping on the small wallpaper image at the bottom of the screen, and then press “Save wallpaper” to apply it to the home-screen.
-
Press on the cross in the top right corner of the yellow settings menu to close the settings.