How do you alt F4 on Steam Deck desktop mode?

To exit or close a program on Steam Deck's desktop mode, users can press the "Alt" key on the keyboard and simultaneously press the "F4" key. This keyboard shortcut is commonly used on Windows systems to close the active window or program. By pressing Alt+F4, users can conveniently exit applications or games running on the Steam Deck's desktop mode.

The last big one to remember: Steam + B (long press), which is the Steam Deck equivalent of Force Quit on Mac and Alt + F4 on Windows.