HP LaserJet 4250 - Manual (Page 265)

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Printer commands
Most programs do not require you to enter printer commands. See your computer and
software documentation to find the method for entering printer commands, if needed.
PCL 6 and PCL 5e PCL 6 and PCL 5e printer commands tell the
printer which tasks to perform or which fonts to
use. This section provides a quick reference for
users who are already familiar with PCL 6 and
PCL 5e command structure.
HP-GL/2 The printer has the ability to print vector graphics
using the HP-GL/2 graphics language. Printing in
the HP-GL/2 language requires that the printer
leave PCL 5e language and enter HP-GL/2
mode, which can be done by sending the printer
PCL 5e code. Some programs switch languages
through their drivers.
PJL HP's Printer Job Language (PJL) provides
control above PCL 5e and other printer
languages. The four major functions provided by
PJL are: printer language switching, job
separation, printer configuration, and status
readback from the printer. PJL commands can
be used to change printer default settings.
NOTE The table at the end of this section contains commonly used PCL 5e commands. (See
Common PCL 6 and PCL 5 printer commands .) For a complete listing and explanation of
how to use PCL 5e, HP-GL/2, and PJL commands, see the HP PCL/PJL Reference Set,
which is available on CD-ROM (HP part number 5961-0975).
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