HP LaserJet 4100 HP PCL/PJL reference (PCL 5 Printer Language) - Technical Ref - Page 123

Table 20-19 Related Commands PE, Polyline Encoded PR, Plot Relative PD, Pen Down PU, Pen Up LA, Line Attributes LT, Line Type PW, Pen Width SM, Symbol Mode Group The Vector Group Line and Fill Attributes Group PD, Pen Down This command lowers the printer's "logical pen" and draws subsequent graphics commands. PD X,Y[,...;] or PD [;] Parameter X,Y coordinates/ increments Format current units Functional Range -230 to 230 - 1 Default no default This command emulates a pen plotter which must lower the pen to draw lines on the page. z No Parameters - Prepares the printer to draw subsequent graphics commands. z X,Y Coordinates/Increments - Draws (in current units) to the point specified. You can specify as many X,Y coordinate pairs as you want. When you include more than one coordinate pair, the printer draws to each point in the order given. EN PD, Pen Down 20-31