Your keyboard has a row of enhanced function keys along the top. These can be used to activate special functions on either the keyboard or your Mac computer.

1. Bluetooth device keys: Switch between the Bluetooth devices you've paired with your keyboard.
   NOTE: See answer 360023411553 for help with pairing more devices, and answer 360023411553 for switching between devices.
2. Mission Control key: Accesses the Mission Control function of Mac OS 10.7 and later.
   NOTE: If you have 10.5 or 10.6, see answer 360023411553 for help with changing this key to access Expose.
3. Launchpad key: Pulls up Apple's Launchpad (with Logitech's software installed on your Mac).
   NOTE: To download software for your keyboard, see answer 31561.
4. Brightness control keys: Controls the brightness of your screen, if you have a Mac computer with an Apple monitor.
   NOTE: If you have an Apple keyboard plugged into your Mac, these buttons may not work. (See answer 360023411553 for more information.)
5. Battery check: Indicates the battery charge by lighting up the LED near the power switch:
   • Green light — means good battery charge
   • Red light — means the keyboard needs charging
6. Play/Pause: Activates the Play/Pause functionality of iTunes.
7. Mute: Mutes system sound.
8. Volume down: Lowers system sound.
9. Volume up: Raises system volume.
10. Eject: Ejects a disc from your Mac's optical media drive.