SmoothType makes your screen look more like the printed page. Using a technique called anti-aliasing,SmoothType blurs the jagged edges of bitmap fonts with shades of gray, effectively doubling yourscreen resolution. This is the similar to the technique used by some laser printers of varying the size ofthe dots to improve the printed image quality. This is also the reason why a television picture can lookso crisp even though TV resolution is really quite low.
Version 2.3.1 fixes a problem drawing smoothed text after switching accountsunder Multiple Users. Version 2.3 introduced subpixel smoothing optimizedfor LCD (flat panel) screens.