How to Turn On ClearType Font Smoothing in Windows XP

ClearType delivers improved font display quality over traditional forms of font smoothing or anti-aliasing. ClearType improves readability on color LCD displays with a digital interface, such as those in laptops and high-quality flat panel displays. Readability on CRT screens can also be somewhat improved. You can turn on Windows XP ClearType using Windows XP PowerToy (download here) - 2.47MB, it lets you activate and tune your ClearType settings via the Windows Control Panel.

ClearType and Traditional Font Comparison

Using the tuner
To start the tuner, select Start and then Control Panel. If you are in Category View, select Appearance and Themes, and then ClearType Tuning.
Windows XP Control Panel

If you are in Classic View, just select ClearType Tuning.

ClearType iconStart the Wizard or select the Advanced tab.

ClearType Tuning
Follow the steps and use the context sensitive help if needed.

More information about ClearType Wikipedia, Microsoft