HP PCL/PJL reference - PCL 5 Comparison Guide

2-112 Printer-Specific Differences ENWW
Color Raster Images
The suggested method for printing color images is by using 24-bit,
direct color pixels with delta row compression. The 24-bit, direct color
is specified using the Configure Image Data command. Delta row
compression is recommended over run length, or TIFF pack bits
since 24-bit, direct color uses three bytes per pixel so there is little
redundancy from one byte to the next. Delta row compression exploits
the redundancy from row to row, and therefore yields better
compression than any other supported PCL compression mode.
Asian Font Support
The following commands are supported especially for Asian font
printing:
• Character Text Path Direction
• Text Parsing Method
• 2-byte characters
• HP-GL/2 Label allows 2-byte characters.
Media Handling
The HP Color LaserJet 4500 printer has two standard paper trays and
one optional tray. They are accessed as follows:
Paper can be selected by requesting a media type using the Paper
Type command (
?&n#Wdpapertype, where # is the number of
characters in “papertype”. For example, the command to select Color
paper is
?&n6WdColor. To select “Prepunched” the
?&n11WdPrepunched command would be used.
Tray Description Command
Tray 1 Multi-purpose paper tray. This is the
upper-most paper input tray and has a
retractable paper support.
?&l4H
Tray 2 Lowest standard paper tray
?&l1H
Tray 3 Optional 500-sheet input paper tray.
When installed, it is the bottom tray.
?&l5H