PS TEXT FORMAT Reference Manual

Font Characteristics
11387 Tandem Computers Incorporated H-7
The orientation characteristic sets the page length, top margin, text length,
and the left and right margins. Once print orientation is chosen, only those
fonts with the corresponding orientation are available for selection. The
default setting is portrait.
Symbol Set. This is a unique ordering of the characters in a font. Each
symbol set is defined with a specific set of applications in mind. Symbol
sets are created for many purposes; for example, the PC-8 symbol set was
designed to support U.S. IBM-PC applications. Table H-3 lists the defined
symbol sets.