<P> The Fn key, short form for function, is a modifier key on many keyboards, especially on laptops, used in a compact layout to combine keys which are usually kept separate . It is typically found on laptops due to their keyboard size restrictions . It is also found on many full - sized "multimedia" keyboards as the F - Lock key . It is mainly for the purpose of changing display or audio settings quickly, such as brightness, contrast, or volume, and is held down in conjunction with the appropriate key to change the settings . </P> <P> Typically, in a compact layout the main area of the keyboard (containing the letter keys) is kept in much the same layout as with a full - sized keyboard, and the numeric keypad is moved to share a group of central keys . This allows typists to enter text without having to learn a new layout . The symbol that is accessed through pressing Fn is often printed on the key in a smaller font, a box, or different color (usually blue but sometimes orange). </P>

What does the fn key do on a laptop
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