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

6-10 Environment Commands EN
Key Points to Remember About Environments
When using PJL to set the printer to a desired state, remember the
following points.
• At the beginning of a PJL job, the current feature settings are
the same as the control panel values or those features set with
the DEFAULT command.
• When a printer language is entered, the current feature
settings (Modified Print Environment) become the same as the
PJL Current Environment. From this starting point, the printer
language commands modify the feature settings. Printer
language commands override all other settings.
• The PJL Current Environment settings can be changed using
the SET command. These settings take effect until the next
PJL reset condition. Note that since the JOB command causes
a reset condition, the SET command should always be used
after the JOB command.
• The control panel settings (User Default Environment) can be
changed using the control panel or the DEFAULT command. In
printers without a control panel, the default settings are
modified with only the DEFAULT command.
• The Modified Print Environment settings are changed using
printer language commands. These settings take effect for the
duration of the printer language job. After a printer
language-specific reset, such as <ESC>E for PCL, the PJL
Current Environment feature settings are loaded into the
Modified Print Environment.
• If the SET command is used in a PJL job, always use the PJL
RESET command after the job is completed.