Learn to Use your Computer

The Settings tab of the Control Panel allows you to change the color quality of your monitor between Medium (16 bit) and Highest (32 bit) used by Windows XP, and select a new screen resolution (the higher the number of pixels, the smaller the items and fonts appear on the desktop, enabling Windows to display more stuff on-screen). You can also click the Advanced button to open a dialog box for your monitor in which you can tweak your computer monitor and screen adapter card settings. Click the Troubleshoot button to open a diagnostics screen in the Help and Support Services window that can suggest things to try if you're experiencing screen display problems.
To reach the Control Panel, click Start, Settings, Control Panel, Display. The settings tab is the last of five tabs, following Themes, Desktop, Screensaver, and Appearance.