HP 4 FAMILY - Manual (Page 61)

Pixel Placement
Command
This command determines how pixels are rendered in
images.
?*l # R
# = 0 - Grid intersection
1 - Grid centered
Default = 0
Range = 0, 1 (command is ignored for other
values)
Two models are used for rendering pixels when an image is
placed on paper:
Grid Intersection Model
Grid Centered Model
This command can be invoked multiple times during a
page. It has no effect except to switch the model being used
for imaging.
Note The PCL Pixel Placement command determines how pixels
are placed for both PCL and HP-GL/2 operation.
Printer-Specific Differences 2-25