12 Key

How do I get the F 1-10 keys on my Mac OSX to perform the shortcuts they're supposed to in every program?

The F10-12 keys adjust the volume only.. how can I get them to perform functions like displaying the multiple screens open, show desktop, etc?? My old Mac did that... but now the F keys seem virtually useless! I mean how often do I really need to adjust screen brightness?! Please help me restore the beauty of the F keys!!!

The system has a way to change the "F1-10" keys ("function keys") but not to change the other keys. System Preferences > Keyboard (or "Keyboard & Mouse"). Select the tab "Keyboard Shortcuts". Follow the instructions for changing a shortcut.

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