Multi plot graph - auxiliary curves

[Oliveira]

I am in trouble with a multi plot graph. There is a wave chart that I have to plot an auxiliary line when the user clicks on the graphic. I know how to get the initial point and the final point of the auxiliar line. But I don´t know how can I plot this line in the same graph.

Any ideas, sugestions or examples?

Thank you in advance

[Oliveira]

?

[Ben]

Speaking only for myself, I am not sure about the nature of your request.

Could you please post some code showing an example of what you can do now and a jpg of what you desire.

This may help us help you.

Ben