"Full Screen" is a display mode that allows applications, videos, or games to occupy the entire screen of a device, hiding all other interface elements like toolbars and menus. This mode enhances the viewing experience by eliminating distractions, making it ideal for watching movies or playing games. To activate Full Screen, users typically click a button or press a keyboard shortcut, such as F11 on many web browsers. Exiting Full Screen can usually be done by pressing the same key or clicking an exit button, returning the display to its normal windowed mode.