Thank you, I think the function plotter is what I'm looking for. Is there a good writeup anywhere on how to use it? I tried creating a rectangle but couldn't select it in a way that the function plotter would see.

I need to do a technical figure showing a sinusoidal waveform plus some vertical and horizontal cursor lines and baselines. Is there any way to specify a line path in the shape of a sine function, multiplied by another function to give the effect of slowly-varying amplitude? I would do it in Dia exc...