Spacing - HP PCL 5 Reference Manual

Spacing

Another characteristic that differentiates fonts is spacing. Fonts have
either fixed or proportional spacing. Fixed-spaced fonts (Figure 7-3)
are those in which the inter-character spacing is constant.
Proportionally-spaced fonts (Figure 7-4) are those in which the
inter-character spacing varies with the natural shape of a character.
Figure 7-3 Fixed Spacing
Figure 7-4 Proportional Spacing
7-4 Fonts
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