I dont think you can have different colors on the built-in plot
legend. But sure, you could read the PLOT COLOR for each plot, then
set the TEXT COLOR in each element of the array to the corresponding
color.
I think what you are going to have to do is use three overlayed plots
each with its own data. When you move the slider you make the chart
you want to see visible and the other invisible. It takes a little
bit of coding and a lot of alligning of controls but you can pull the
illusion off.
Having three charts seems complicated. Maybe there's another way.
Is it posible to make my own legend by creating a string array with
the names of the channels in the color of the waveform?
Thanks;
Steve