Try looking here,
P.S. The CCC comes with a fairly in depth help file, just click on the blue question mark for help file for the screen you are lookign at, or click on Options up near the top right and select Help - Help contents for the full Help file.
P.P.S. The screen shot that thefabe posted is the old style CCC, if you are using the newer ATI drivers
(think it was 9.2 or 9.3 that they made the change) then yours will look like the one I posted.