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How-To Geek

Fn Key

The Fn key (FuNction key) is a special key found primarily on notebook computers. Not to be confused with the Function Keys (typically F1-F12 on a regular desktop keyboard) the Fn key is a modifier key designed to give keyboard buttons a secondary function. It is common, for example, for notebook computers to have symbol labels on their top row numeric keys designating system functions accessible via the Fn key (e.g. the 1 key + FN yields monitor dimming or the 5 key + FN turns the Wi-Fi on and off).

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