Editing Your Dashboard
Step 1: Click on your desktop.
Step 2: Click on the apple at the top left corner.
Step 3: Then scroll down & click on system preferences.
Step 4: In the personal section, find Dashboard & Expose then click on it.
Step 5: Find the keyboard shortcuts section & edit your preferences.
Step 6: After you have edited your preferences, close the window. Then pull up a few windows & try each key.
Keystrokes:
F9
F10
F11
F12
All the keys responded correctly. Now you know how to edit you dashboard preferences.