Press F11 to toggle full screen in most web browsers
Press Fn + F11 if your laptop uses function keys for special controls
Press Alt + Enter in some apps and games
Click the full screen icon in the top corner of the app or video player
Use the maximize button to make the window fill the screen
In Windows, press Win + Up Arrow to maximize the active window
In macOS, click the green button in the top-left corner of the window
In video players, right-click and choose Full Screen
In browser videos, click the full screen button in the video controls