The pen is lowered and then moved to the position calculated from adding the specified X and Y displacement to the current pen position. After IDRAW executes, the logical pen position is updated and the pen is left in the down position. IDRAW 0,0 draws a point.
If you specify a destination which is outside the clipping area, the logical position is set to that point but the pen is not moved. Only the portion of the vector which lies inside the clipping area is plotted.
