HP PCL/PJL reference (PCL 5 Printer Language) - Technical Reference Manual Part II

19-28 The Configuration and Status Group EN
If you specify P1 and P2 beyond the PCL Picture Frame, your drawing
is scaled with respect to those locations; however, only the portion of
the drawing fitting within the effective window is drawn.
Note The specified P1/P2 percentages are converted to the equivalent
plotter unit coordinates. If the coordinate system orientation
subsequently changes (for example, by sending an RO command),
the plotter unit position is maintained with respect to the new
orientation. If an IP command without parameters is executed after
the axes have been rotated with the RO command, P1 and P2
locations change to reflect the rotation.
The locations of P1 and P2 interact with the following commands:
An IR command remains in effect until another IR command is
executed, an IP command is executed, or the printer is initialized.
Table 19-13 Commands Affected by P1/P2
Command Group
IW, Input Window The Configuration/Status Group
RO, Rotate Coordinate System
SC, Scale
FT, Fill Type The Line and Fill Attributes Group
LT, Line Type
PW, Pen Width
WU, Pen Width Unit Selection
DR, Relative Direction The Character Group
LB, Label
SR, Relative Character Size