HP LaserJet 4100 HP PCL/PJL reference (PCL 5 Printer Language) - Technical Ref - Page 284
DR Command, Label Direction, Effects of Scaling on Label Direction, Table 23-19
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Figure 23-23Effects of Scaling on Label Direction Labels begin at the current pen location and thus are drawn parallel to the directional line, not necessarily on it. Also, negative parameters have the same effect on direction as described for the DI command. At least one parameter must not be zero. The ratio of the parameters to each other is more important than the actual numbers. The table below lists three common label angles produced by using ones and zeros. Table 23-19 DR Command DR 1,0 DR 0,1 DR 1,1 or DI 0.7,0.7 (any parameters equal to each other) Label Direction horizontal vertical diagonal from P1 to P2 The relative size and sign of the two parameters determine the amount of rotation. If you imagine the current pen location to be the origin of a coordinate system for the label, you can see that the signs of the parameters determine in which quadrant the label is in. 23-40 The Character Group EN