1. Open the Pictures application on the BlackBerry PlayBook.
2. Select one of the built-in wallpapers, or choose a picture that has been imported onto the device. See our How To Tutorial for more information on synchronizing personal media with the BlackBerry PlayBook.
3. Once a picture has been selected, swipe down from the top bezel of the tablet, then tap on "Set as Wallpaper" to complete the task.