The character drawing routines expect a font parameter which describes the font to use. The font selection, though limited, should be enough for the basic purposes for which this library is used. Valid font types are the strings "tiny", "small", "mediumBold", "large", or "giant". Each one is a different size. fontTiny is 5x8, fontSmall is 6x12, fontMediumBold is 7x13, fontLarge is 8x16, and fontGiant is 9x15.