Ubuntu contrast
If you’re on Ubuntu (I’m on Gutsy Gibbon), try this—hold Start button and press either N or M key. I’m just blown away. (Update: To experience the bliss, you’ll need to be using Normal or above (under System > Preferences > Appearance > Visual Effects.)

The same can be done of a mac by pressing ctrl+alt+command+8 keys
Jan 27, 08 at 13:53I don’t use a Mac, so I wouldn’t know, but thanks for the info, Adel.
Jan 27, 08 at 13:56