How to adjust contrast ratio?

[bessel]

Hi there, I guess it is straightforward that Fn+Home/End adjusts the brightness; but how to change the contrast ratio? Thanks!

[darrenf]

Active matrix (TFT) screens do not have a hardware contrast adjustment like passive-matrix screens did in the past. You can modify gamma, brightness and contrast, either for all colors or individual colors, from within the Catalyst Control Center.

-darren