In Mac OS X 10.7 (Lion), Apple changed the default keystroke for its Expose replacement: Mission Control. Your keyboard uses the new default for Mission Control. Here's how to update the keystroke for:

• Mac OS X 10.6 and earlier
• Mac OS X 10.7 (Lion )

Mac OS X 10.6 and earlier

If you have Mac OS X 10.6 or earlier, you'll need to change the keystroke in your system preferences to use the Expose key on your keyboard.

1. Go to the Apple Menu and select System Preferences.

2. Click Keyboard.

   

3. Click the Keyboard Shortcuts tab.

4. From the menu on the left, select Expose.

   

5. Find Expose > All Windows and double-click the keystroke to the right to edit it.

   

6. Press the Expose/F3 key on your keyboard. A caret-arrow icon shown should display next to All Windows.

   

7. Test the Expose key on your keyboard to make sure your new keystroke works.

Mac OS X 10.7 (Lion)

If you have Mac OS X 10.7 and have updated from an earlier version, your update may ave kept the old keystroke. You'll need to go into System Preferences and set your system to use the default 10.7 Mission Control keystroke.

1. Go to the Apple Menu and select System Preferences.

2. Click Keyboard.

   

3. Click the Keyboard Shortcuts tab.

   

4. From the menu on the left, select Mission Control.

5. Click the Restore Defaults button in the lower right.

   

6. Test the Mission Control key on your keyboard to make sure the new keystroke works.

If the new keystroke for Mission Control in 10.7 doesn't work:

1. Return to the Keyboard Shortcuts tab.

2. In the Mission Control window, look for the Mission Control line.

   

3. Double-click the keystroke shown on the right to edit it.

4. Press the Expose/F3 key on your keyboard. A caret-arrow icon shown display next to Mission Control.

   

5. Test the Mission Control key on your keyboard again to check whether the new keystroke works now.