You can easily select a wallpaper from a collection of a few in your system and set it as wallpaper for your Home screens.Touch and hold an empty location of a home screen.
Choose either Gallery, Live Wallpapers or Wallpapers from the pop-up menu.
Select an image and set it as wallpaper.
Alternatively, you can run the Settings app, then go to DEVICE > Display > Wallpaper, and continue with the step 2 above.
