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How to Turn Off the Function Key on a Laptop

Updated April 17, 2017

The function key is denoted by the symbol "Fn" on your keyboard. The function key works like a shift key to enable a second function on a dual-purpose key. The Function key is mostly used to control your laptop screen brightness and speaker volume. If turned on, the "Fn" key can produce unwanted characters while you are typing certain keys on your laptop keypad.

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Locate the "Number Lock" key on your keypad; it is often abbreviated as "Num Lk." Some manufacturers like Sony Vaio combine "Num Lk" with "Scr Lk" (Scroll Lock). This key is typically located at the top right-hand side of your keypad.

Press the "Num Lk" key once. This will turn off your function keys.

Press "Num Lk" key again to turn on your function keys.

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About the Author

Suvro Banerji is a recent graduate of the Missouri School of Journalism where he earned a dual degree in broadcast news and political science. He began writing professionally in 2005 at KOMU-8 News (NBC) where he worked as a multimedia producer. Banerji has also interned with CNN for two consecutive years.

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