Personally I always set the brightness etc. of my monitor on its hardware interface. I guess you can't access these settings from windows. I could be wring tho, probably there are some old VGA Setup functions, like with printers.
What you can do from within Blitz is setting the Gamma values. This can be used for Brightness and color too. Basicly it allows to "set the color of each color".
What you can do from within Blitz is setting the Gamma values. This can be used for Brightness and color too. Basicly it allows to "set the color of each color".