Toggles behavior of function keys between standard and special features (e.g., volume, play/pause), as described here.
Specifically, accomplishes the following when keyword "fn toggle" is entered:
Choose System Preferences from the Apple menu. From the View menu choose Keyboard (or Keyboard & Mouse in Mac OS X v10.5.8 and earlier).
Check / uncheck "Use all F1, F2, etc. keys as standard function keys" (Note: when checked, requires holding the fn key to press standard function keys, when unchecked, does not require holding the fn key to press standard function keys)
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