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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