HP PCL/PJL reference - Printer Job Language Technical Reference Manual

6-20 Environment Commands EN
PAGEPROTECT Page protection configuration. The
page protection feature reserves a
block of printer memory to prevent
printer overrun errors (error 21) when
formatting very dense or complex
images, especially HP-GL/2 images.
The variable can be set to any legal
value at any time, regardless of the
current amount of free memory or the
currently set resolution. When a job is
sent, if there is not enough memory to
print correctly with the current resolution
and page protection configuration, the
system temporarily overrides the
resolution and/or page protect values to
run the job. In these cases, the job may
be printed at 300 dpi without page
protection. When the page protection
status is changed, memory is
reconfigured and all downloaded fonts,
PCL macros, and PostScript
dictionaries are lost (however, no I/O
data is lost). Refer to “Commands that
Affect Printer Memory” in Appendix A.
OFF, LETTER,
LEGAL, A4, AUTO,
ON
PALETTESOURCE Specifies how color settings are
derived, either from the device's
control-panel settings or through the
software application.
DEVICE,
SOFTWARE
PAPER Physical paper (and envelope) sizes.
Letter, Legal, Ledger, A5, A4, A3,
Executive, JISB4, and JISB5 are paper
sizes; Com10, C5, DL, Monarch, and
B5 are envelope sizes; JPOST and
JPOSTD are Japanese postcard sizes;
CUSTOM is for feeding different sizes,
but it varies with the printer: the
LaserJet 4P/4MP printers interpret
CUSTOM as odd sizes, such as 3 x 5
cards and labels; the LaserJet 4V/4MV
printers interpret CUSTOM as 11.7" x
17.7" paper.
LETTER, LEGAL,
A5, A4,
EXECUTIVE,
LEDGER, A3,
COM10, C5, DL,
MONARCH, B5,
CUSTOM, JISB4,
JISB5, JPOST,
JPOSTD
and others
(see Appendix A)
General PJL Environment Variables (continued)
Variable Description
Sample Value
Range