HP PCL/PJL reference (PCL 5 Printer Language) - Technical Reference Manual Part II

EN PD, Pen Down 20-33
Figure 20-18
Note If an odd number of coordinates is specified (an X coordinate without
a corresponding Y coordinate), the printer ignores the last unmatched
coordinate
.
Table 20-21
Related Commands Group
PA, Plot Absolute The Vector Group
PE, Polyline Encoded
PR, Plot Relative
PU, Pen Up
LA, Line Attributes Line and Fill Attributes Group
LT, Line Type
PW, Pen Width
SM, Symbol Mode