A screen background, background decoration, or background (also known as wallpaper, desktop screen background, desktop background, desktop image, or desktop image on computers) is a digital image (photo, drawing, etc.) used as a decorative background for an interface graphic users on computer screens, smartphones or other electronic devices. On computers, wallpapers are generally used on desktops, whereas on mobile phones, wallpapers serve as the background for the home screen. Although most devices come with a default background image, modern devices usually allow users to change the background image manually.