How to use Function keys in MAC without pressing FN?

This is just a simple tweak but would be useful for those MAC users.
In most cases, you'll have to press and hold "FN" key to make a function key actually work like a function key.

There's a tweak how to use Function keys on MAC keyboard without pressing "FN" key.

Here�s what you do:

1. Click the Apple menu in the top-left corner of the screen, then select System Preferences. 
2. Click the Keyboard icon, then check the box marked �Use all F1, F2, etc. keys as standard function keys.� 
3. Close the window to save your changes. 

Now, you can tap a function key without pressing and holding the �Fn� key first.