To go full screen on most Windows applications, the common and easiest method is to press the F11 key on your keyboard. This toggles full-screen mode on or off in many programs such as web browsers and file explorers. If F11 doesn't work, try Fn + F11 especially on some laptops. To exit full screen, press F11 again or use the Escape (Esc) key. On Mac, full screen is usually enabled by clicking the green button in the top-left corner of the app window or by holding the pointer over the green button and selecting "Full Screen" from the menu. To exit, do the same and choose "Exit Full Screen" or press the Escape key. Some apps may have their own full-screen shortcuts, for example, in VLC media player, it's the F key , and on streaming sites like YouTube, there is a full-screen icon or the F key shortcut for videos.