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fn + function key enables you to use the F1 to F12 keys on a laptop. If you don't press it the keys just do the function that the picture relates too (volume control and brightness are a couple if I remember correctly).
 
if you're on a laptop, you'll see a lot of keys with subtext. for instance, the up arrow has "page" written on it, so pressing "fn" + "up arrow" will be the equivalent of pressing "page up."
 
fn + function key enables you to use the F1 to F12 keys on a laptop. If you don't press it the keys just do the function that the picture relates too (volume control and brightness are a couple if I remember correctly).

o, ok thanks
 
And what's the easiest ways to set these Fn keys? As in, how do I set Fn+F1 to perform a certain task?
 
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