HP 5961-0509 manual From the starting point of the arc, Ec%Øa

Table 20-31 Example: Using the RT Command (Relative Arc Three Point) (continued)

RT100,-100,0,-200;	Draw an arc from the current pen
	position, through a point (100,-100)
	plu away, with an ending point (0,-200)
	from the starting point of the arc.
PU100,100;PD200,0;	Lift the pen and move it (100,100) plu
	from the current pen position, pen
	down, and draw a line 200 plu in the
	X direction.
EC%ØA	Enter the PCL mode.
ECE	Send a reset to end the job and eject
	the page.

Figure 20-22

EN RT, Relative Arc Three Point 20-51