It is a key on your keyboard if you press alt and F4 it will close your window. If you use a recording device such as Snagit or fraps that may be the hotkey to start and stop recording. It may also be used in a computer game. If you press it will on a web site it will open up the tab that shows the websites that you have been on.
It closes down the current window you're on.
on a windows computer, it closes whatever window is currently open
The key sequence <Alt>F4 is the standard sequence to exit a program.
alt f4 alt f4
Alt + F4 to close the active application window, or, if no window is open, shut down Windows
If you have an application open, Alt+F4 will shut it down. If you do not have an application running, it will shut down the computer.
Alt - F4 is the main one, though you can also use Alt - F - X.
Press Alt-F4 or press Alt-F-X to exit Word.
Alt + F4
Alt + F4
Alt+F4 in all applications in some operating systems work as a exit shortcut.
Alt+F4
Alt+f4
Alt f4
alt and f4