HP LaserJet 4100 HP PCL/PJL reference (PCL 5 Printer Language) - Technical Ref - Page 306

LO, Label Origin This command positions labels relative to the current pen location. Use the LO command to center, left justify, or right justify labels. The label can be drawn above or below the current pen location and can also be offset by an amount equal to .25 times the point size (or 16 grid units [0.33 times the point size] for the Stick font). LO position[;] or LO [;] Parameter position Format clamped integer Functional Range 1 to 9 11 to 19 21 Default 1 Notes The printer interprets the parameters as follows: z No Parameters- Defaults the label origin. Equivalent to (LO1). z Position- The position numbers are graphically illustrated below. Each dot represents the current pen location. The label positions LO 11 through LO 19 differ from LO 1 through LO 9 only in that the labels are offset from the current pen location. The label position 21 provides a PCL-compatible label origin. The character(s) are printed at the same location as in PCL. Label origins do not change text path. To change the text path, use the Define Variable Text Path (DV) command. Label position 21 is not shown in Figure 23-33 because the exact location is dependent on the PCL position. 23-62 The Character Group EN