If you did not install the Magictune software, you can adjust the settings manually with the buttons. The OSD (on-screen display) will let you tinker with brightness, contrast and other color settings.
Now if you did install Magictune, you can do all this through the software.
The Magictune software also comes with a calibration utility. The program prompts you to adjust the screen color and shows you a before and after image for comparison.
There's also the Natural Color program on the CD-Rom which lets you adjust monitor and printer colors.
For some extra testing and callibration, I used Iiyama's Monitor Test utility. It runs a few tests for geometry, convergence, colour and others. This is a good way to catch anomolies as well as any dead pixels, which we fortunately did not find.