A
wallpaper or
background (also known as a
desktop wallpaper,
desktop background,
desktop picture or
desktop image on computers) is a digital image (photo, drawing etc.) used as a decorative background of a
graphical user interface on the screen of a
computer, mobile communications device or other electronic device. On a computer it is usually for the
desktop, while on a
mobile phone it is usually the background for the 'home' or 'idle' screen. Though most devices come with a default picture, users can usually change it to custom files of their choosing.