Plotting Parallel Lines

I’m using psxy to plot a line between two points. Is there an easy way to then plot a parallel line at a set perpendicular distance from the original line?. The psxy -Ddx/dy option doesn’t quite fit the bill as the values of dx and dy will change as the angle of the line changes.

No, you would have to do the basic math to compute two new points first.

OK, thanks for the reply.