Start by installing video card drivers for your adapter that support
that feature. The vid card manufacturers web site should have current XP
compatible versions. Then after properly installing those drivers you
will find added controls on the settings advanced section.

Perfect_Theory wrote:

> Previously, on Windows 98, I was allowed to change the gamma, contrast, and
> brightness levels at my will. And, considering how dark my monitor is, this
> was very useful. I now have Windows XP, but cannot figure out how to change
> the gamma, contrast, or brightness. I need a step by step walkthrough of how
> to change these, if possible. Thank you for your help!
>
> ~Cody