What are the F1, F2, F3 to F12 keyboard keys used for? - Digital …
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WEBFeb 13, 2017 · F keys, Fn, keyboard. Function keys were used by various computer programs to fulfill various functions. Over time, many of those functions became usual, even default if you want. That's why, as you'll see in the next section of this article, F1 is almost always used for opening Help files, and Alt + F4 is almost always used for closing apps.
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