Dot-Matrix Printer Fonts

Dot-matrix printers support device fonts and printable screen fonts. Usually, a dot-matrix printer includes only a limited range of internal device fonts. Typically, fixed-spacing fonts are supplied in a variety of characters-per-inch (CPI) sizes and are conventionally named "typeface xxCPI," where typeface is the typeface name and xx is the number of characters per inch. Distinguishing a device font on a dot matrix printer is usually as easy as checking for the CPI designation at the end of the font name, such as Courier 10 CPI.

Through the Universal printer driver, dot-matrix printers can also support TrueType. When you use TrueType fonts on a dot-matrix printer, Windows NT sends a rasterized graphics image to the printer.

Dot-matrix printers do not provide landscape device fonts, but vector and TrueType screen fonts can be printed in any resolution or orientation. Dot-matrix device fonts are faster but less flexible than screen fonts.

Dot-matrix printers are typically distinguished as either 9-pin or 24-pin printers (but not limited to these):

• 9-pin dot-matrix printers such as the Epson 9-pin and IBM Proprinter series usually print in a 1.67:1 aspect ratio. The Windows NT Epson 9-pin driver supports resolutions of 120x72 (1.67:1 aspect ratio), 120x144 (1:1.2), and 240x144 (1.67:1).

• 24-pin dot-matrix printers such as the Epson 24-pin and IBM Proprinter 24 series can print in 120x180 resolution (1:1.5 aspect ratio), 180x180 (1:1), and 360x180 (2:1). Some others, such as the NEC 24-pin, provide a 360x360 resolution. The 180x180 resolution is usually best for printing raster screen fonts. In 180x180 resolution, these printers can print 1:1 aspect ratio screen fonts, such as the E set (96x96 dpi) and the F set (120x120 dpi). E set fonts will be available at about 50 percent, and F set fonts at 75 percent of normal point sizes. A true 180x180 dpi screen font set is available by special order from Epson of America.

Some 24-pin dot-matrix printers, such as the Epson and NEC printers, also support font cards or cartridges. You can use these fonts if the Windows NT driver for that printer supports them. To use a font card or cartridge, see "Font Cartridges" later in this chapter.