CHANGE WALLPAPER: From the home screen, press the OK button. Press the directional buttons to navigate to the Settings app > Personalization tab > Display > Wallpaper.
Navigate to and select the desired wallpaper source.
Navigate to the desired wallpaper, then press the right option button to select Save. Press the Power/End button to exit. Note: Changing wallpaper also changes the wallpaper on the small display.