What inspired this wish list request?
I made a plot using graph builder (x and y variables plus an 'overlay' variable). I applied a colour scale to the points/overlay variable but it treats them independently! For example with the rainbow colour scheme i applied i get this result:

What is the improvement you would like to see?
What I'd really like to see is that the line colours are representative of the colour of the dots/data points that they are fitted through. So my green lines should really be blue/purple, and my green dots should really be red/orange.
Why is this idea important?
Because as it is it just looks weird and makes it more difficult to interpret.
just select the lines and apply the color setting via

to get the setting applied to the points as well, please remove the points from the legend.
[If the points are visible as well, JMP think that you want to apply different settings to the points]