HP PCL/PJL reference (PCL 5 Printer Language) - Technical Reference Manual Part II

Glossary-10 EN
Pitch
Pitch describes the number of characters printed in a horizontal
inch. Pitch only applies to fixed-spaced fonts since the number of
characters per inch varies for proportionally-spaced fonts.
PJL
PJL (Printer Job Language) commands provide job-level control,
such as the ability to switch printer languages (or “personalities” -
such as PCL to PostScript) between jobs. PJL also provides two-way
communications with the printer. PJL can also be used to change the
printer’s control panel settings and modify the message displayed on
the control panel.
Point
A PCL point is a unit of measurement that equals 1/72nd inch. Font
height is measured in points.
Positive angle of rotation
An angle used to create a plot in HP-GL/2 which is rotated in the
direction from the +X-axis to the +Y-axis. Note that the relationship
of the +X-axis to the +Y-axis can change as a result of scaling point
or scaling factor changes, thus changing the direction of a positive
angle of rotation. See “Drawing Arcs” in Chapter 20 for more
information.
Primary (Secondary) Font
A PCL convention whereby two fonts can be defined internally
simultaneously. The primary font is accessed via the control code
“SI” and the secondary font is accessed via the control code “SO.”
The factory default state is primary font designated.
Printable Area
The printable area is the area of the physical page in which the printer
is able to place a dot. The physical page refers to the size of the
media installed in the printer.
The relationship between physical page, logical page, and printable
area is defined in Figures 2-2 and 2-3.