Change your wallpaper
- Open Appearance.
- Under Wallpaper, tap Change Wallpaper.
- Tap a picture.
To use your own picture, first copy it to a folder named wallpapers on your device (learn how). Your device scales and crops the picture to fit the screen.
Checked against the LuneOS code and installed apps. Nobody has tried these steps by hand yet, so tell us if something differs.