HP LaserJet 4100 HP PCL/PJL reference (PCL 5 Printer Language) - Technical Ref - Page 81

the PCL Picture Frame. Follow the, can be set equal to the picture frame by issuing an IW; command

Page 81 highlights

Note Figure 19-14Angle of rotations The relationship of the X-axis to Y-axis can change as a result of the scaling point or scaling factor changes, thus changing the direction of a positive angle of rotation. The physical location of the pen does not change when you rotate the coordinate system. The printer updates the pen's X,Y coordinate location to reflect the new orientation. The scaling points P1 and P2 rotate with the coordinate system. However, they maintain the same X,Y coordinate values as before the rotation. This means that P1 and P2 can be located outside of the PCL Picture Frame. Follow the (RO90) or (RO270) commands with (IP) or (IR) to relocate points P1 and P2 to the lower-left and upper-right corners of the picture frame. When the RO command is used, the soft-clip window, if defined, is also rotated, and any portion that is rotated outside of the picture frame is clipped to the picture frame boundaries. The soft-clip window can be set equal to the picture frame by issuing an "IW;" command (see Figure 19-17). EN RO, Rotate Coordinate System 19-35

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EN
RO, Rotate Coordinate System
19-35
Figure 19-14Angle of rotations
Note
The relationship of the X-axis to Y-axis can change as a result of the
scaling point or scaling factor changes, thus changing the direction of
a positive angle of rotation.
The physical location of the pen does not change when you rotate
the coordinate system. The printer updates the pen’s X,Y coordinate
location to reflect the new orientation.
The scaling points P1 and P2 rotate with the coordinate system.
However, they maintain the same X,Y coordinate values as before
the rotation. This means that P1 and P2 can be located outside of
the PCL Picture Frame. Follow the
(RO90)
or
(RO270)
commands
with
(IP)
or
(IR)
to relocate points P1 and P2 to the lower-left and
upper-right corners of the picture frame.
When the RO command is used, the soft-clip window, if defined, is
also rotated, and any portion that is rotated outside of the picture
frame is clipped to the picture frame boundaries. The soft-clip window
can be set equal to the picture frame by issuing an “IW;” command
(see Figure 19-17).