Press F11 in most web browsers and many apps
Press Alt + Enter in some programs and games
Click the full screen button in the app window if available
Use the maximize button in the top-right corner for a larger window
Press Windows key + Up Arrow to maximize a window
Press Windows key + Shift + Enter in some apps
In video players, click the full screen icon or double-click the video
In games, check the display settings for full screen mode