Skia is a stylish sans serif face by Matthew Carter. It was built as a showcase for Apple’s QuickDraw GX technology, and as such has variable weight and width axes. Like a multiple master font, users with the correct software (try SimpleText Pro in MacOS 9) can fine-tune weight and width using sliders in their applications. The font includes old-style numerals, inferior and superior numbers and letters, fractions, and ligatures, demonstrating the richness of character set that such fonts can contain. GX fonts are now correctly termed AAT fonts.