HP 2500 HP PCL/PJL reference - Printer Job Language Technical Reference Manual - Page 77

General PJL Environment Variables (continued) Variable Description Sample Value Range BITSPERPIXEL For PCL 6 only, this variable controls 2, 1 the number of bits per pixel used when printing grayscale or color images. The valid values are dependent on the current setting of RESOLUTION. If RESOLUTION is 300 or 1200, the only valid BITSPERPIXEL value is 1. If RESOLUTION is 600, the only valid BITSPERPIXEL values are 1 and 2. For FastRes 1200 printing, first set the RESOLUTION to 600 and then set BITSPERPIXEL to 2. For ProRes 1200, first set the RESOLUTION to 1200 and then set BITSPERPIXEL to 1. CLEARABLE-WARNIN Returns the configuration for displaying JOB, ON GS clearable warnings (non-fatal error messages cleared by pressing the Continue key.) If the value is set to JOB, then clearable warnings generated by a job are displayed only until the start of the next job. If the value is ON, then clearable warnings are displayed until the user presses the Continue key. COMPRESSRASTER STORAGE Specifies whether or not raster data is ON, OFF to be compressed when the printer runs out of memory. When set ON, the throughput may be slowed down, though more complex images can be processed. The default is ON. CONTEXT-SWITCH Enables/disables the use of implicit ON, OFF personality switching. If a job is sent without an ENTER LANGUAGE command, the printer looks for context clues to determine which personality takes effect. When the personality is changed, memory is reconfigured and all downloaded fonts, PCL macros, and PostScript dictionaries are lost (however, no I/O data is lost). EN Environment Commands 6-13