I click on the tiny apple
on the top left of my Mac.
This I select Preferences from the dropdown window that appears:
This opens up the Preferences window:
I click on the keyboard icon inside the Preferences window:
Then I check the box to the left of the ‘use all F keys’
Note: If I don’t do this, Mac’s shortcuts will override the shortcuts in Adobe Dreamweaver, Photoshop and Flash.
I then hit the back button
Then I select the expose icon:
And make the expose settings look like this
This enables me to see the desktop if I move my mouse to the top left of the monitor (a very useful trick) and if I move my mouse to the top right of the monitor, I will be able to see all open windows (another very useful trick).