Epson LQ-2550 User Manual - Page 129

Design grids To design a character you use a grid that is 24 dots high-one dot for each pin on your printer's print head. The width of the character matrix depends on the character set you are using. For draft characters, the grid is nine dots wide. For Letter Quality it is 29 dots wide, and for proportional characters it is 37 dots wide, with the dots for both Letter Quality and proportional spaced more closely together than those for draft. The illustrations below show the two design grids. The line at the side labelled cap height indicates the top of a standard capital letter, and the line labelled baseline indicates the baseline for all letters except those with descenders (the bottom parts of letters like j and y). The bottom row is usually left blank because it is used for underlining. Draft pica Letter quality / Proportional 4-24 Using Software and Graphics