Lexmark Optra Optra T Administrator's Manual page 158

Bitmapped and scalable
The printer uses both bitmapped and scalable fonts.
fonts
Bitmapped fonts are stored in printer memory as predefined patterns
of bits that represent a typeface at a specific size, style and resolution.
An example of a character from a bitmapped font is shown at left.
Bitmapped fonts are available in different type styles and point sizes as
downloadable fonts. Contact the place where you bought your printer
for more information about downloadable fonts.
Scalable fonts (also called outline fonts) are stored as computer pro-
grams that define the outlines of the characters in the font. Each time
you print characters from a scalable font, the printer creates a bitmap
of the characters at the point size you choose and saves it temporarily
in printer memory.
These temporary bitmapped fonts are deleted when you turn off or
reset the printer. Scalable fonts provide the flexibility of printing in many
different point sizes.
Your printer uses different scalable font formats for downloading fonts
to the printer. PCL 6 emulation uses Intellifont and TrueType scalable
fonts. PostScript 3 emulation uses Type 1 and TrueType scalable fonts.
There are thousands of different scalable fonts available in these differ-
ent font formats from numerous font suppliers.
If you plan to use many downloadable bitmapped or scalable fonts or if
you plan to use many different sizes of scalable fonts, you may need to
purchase additional memory for your printer.
Understanding Fonts 158