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).
- By Jason Fitzpatrick on 06/1/13