HP LaserJet 4100 HP PCL/PJL reference (PCL 5 Printer Language) - Technical Ref - Page 19
HP-GL/2 & PCL Orientation Interactions, Orientation Interactions Between PCL and HP-GL/2
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HP-GL/2 & PCL Orientation Interactions The relationship between the orientation of the HP-GL/2 coordinate system and the PCL coordinate system is important. Figure 17-6 illustrates this relationship for the default HP-GL/2 orientation (RO 0) and the PCL logical page orientation. As shown in the illustration, in the default HP-GL/2 orientation, the origin of the HP-GL/2 coordinate system defaults to the lower-left corner of the PCL Picture Frame. (HP-GL/2 and PCL X-coordinates increase in the same direction, but the Y-coordinates increase in opposite directions.) Notice that a change in the PCL logical page orientation changes the orientation of the PCL coordinate system and the HP-GL/2 coordinate system. Note EN Figure 17-6 Orientation Interactions Between PCL and HP-GL/2 The relationship between the coordinate systems can be changed using the HP-GL/2 Rotate (RO) command. Rotations specified by the RO command are relative to the default HP-GL/2 orientation (which matches the PCL orientation). Figure 17-7 shows how the RO command modifies the default HP-GL/2 orientation. A change in PCL print direction has no effect on the HP-GL/2 orientation, the physical position of the picture frame, or the picture frame anchor point. HP-GL/2 & PCL Orientation Interactions 17-17