PC: Select a photo. After the full-size image has loaded, right-click on it and select "Set as Background" or "Set as Wallpaper" from the pop-up menu. If the image is not centered on your screen, go to My Computer, Control Panel, Display, and change from Tile to Center.
Mac: Select a photo. After the full-size image has loaded, right-click on it and select "Set as Background" or "Set as Wallpaper" from the pop-up menu. If the image is not centered on your screen, go to My Computer, Control Panel, Display, and change from Tile to Center.
To remove: From a PC, go to My Computer, Control Panel, Display, Wallpaper, then choose a different option. From a Mac, go to Desktop Pictures and select a different image.