HP 5961-0509 Positive angle of rotation, Location to reflect the new orientation, See Figure

	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).

EN RO, Rotate Coordinate System 19-35