If you have an LCD panel for your computer display, such as those on laptop computers or flat-panel monitors, you can dramatically improve the display of text with simple settings, if you use Windows XP or Mac OS X. Here are the details…
In Windows XP, the feature is called ClearType and is not turned on by default. To activate it, choose Start > Control Panel > Display > Appearance > Effects > method to smooth fonts (checked) > ClearType. You can make it even better by visiting Microsoft Typography and running the ClearType Tuner utility.
In Mac OS X, the feature is called Font Smoothing and is available in versions 10.2 and higher of the Mac operating system. It is usually activated by default, but to adjust it choose Apple Menu > System Preferences > Appearance, and then pick from the “Font smoothing style” drop-down menu at the bottom of the window. You need to quit and relaunch applications for the new setting to apply, or you can log out and log in again, or restart your computer, for the whole system to use your new setting at once.
Incidentally, the technique used, called sub-pixel rendering, does not work on traditional CRT picture tubes because it depends on the way LCD panels are built, and neither Mac OS X nor Windows XP lets you control what kind of font smoothing gets used on different monitors independently. So if you use an LCD and a CRT connected to one computer, you must pick one setting for both displays.