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

19-36 The Configuration and Status Group EN
Note The RO command also rotates the contents of the polygon buffer.
The RO command remains in effect until the rotation is changed by
another RO command, or the printer is initialized.
Figure 19-15 shows the default orientation and the result of rotating
the orientation without relocating P1 and P2.
Figure 19-15Using the RO Command Without Using the IP
Command