Scalable Fonts - Canon IMAGERUNNER C2550 Printer Manual

Bitmapped fonts are fixed in size and specified by characteristics called "attributes,"
such as typeface, stroke weight, style and so on. Various types of bitmapped fonts
are produced by the combination of these attributes.

Scalable Fonts

With scalable fonts, characters are freely enlarged or compressed from the one
point to any size you wish in 0.1 point increments.
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Some Basic Facts about Fonts