HP LaserJet 4100 HP PCL/PJL reference (PCL 5 Printer Language) - Technical Ref - Page 72
IR, Input Relative P1 and P2
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IR, Input Relative P1 and P2 This command establishes new or default locations for the scaling points P1 and P2 relative to the PCL Picture Frame size. P1 and P2 are used by the Scale (SC) command to establish user-unit scaling. IR can also be used in advanced techniques such as printing mirror-images, enlarging/reducing drawings, and enlarging/reducing relative character size, or changing label (text) direction. IR XP1,YP1,[XP2,YP2;] or IR [;] Parameter Format XP1YP1[XP2YP2;] clamped real Functional Range 0 to 100% Default 0,0,100,100% When P1 and P2 are set using IR, the scaled area is page sizeindependent. As the PCL Picture Frame changes size, P1 and P2 keep the same relative position within the PCL Picture Frame boundaries. z No Parameters - Defaults P1 and P2 to the lower-left and upper-right corners of the PCL Picture Frame, respectively. z X,Y Coordinates - Specify the location of P1 (and, optionally, P2) as percentages of the PCL Picture Frame limits (specifying P2 is not required). If P2 is not specified, P2 tracks P1; the P2 coordinates change so that the distances of X and Y between P1 and P2 remain the same. This tracking process can cause P2 to locate outside the effective window. Used carefully, the tracking function can be useful for preparing more than one equal-sized drawing on a page. For an example, refer to "Drawing Equal-Sized Pictures on a Page" earlier in this chapter. z Neither X,Y coordinate of P1 can equal the corresponding coordinate of P2. If either coordinate of P1 equals the corresponding coordinate of P2, the coordinate of P2 is incremented by 1 plotter unit. 19-26 The Configuration and Status Group EN