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Parallel coordinates plot - change color or lighten the unselected lines

If you take a look at the Advanced Parallel Coordinates Plot example, the unselected lines are a very dark gray color in areas where it’s really dense. Is it possible to change the opacity (or change the color) of the unselected lines to be lighter?

Not at the moment unfortunately.

Is adding more customizability to this plot in the future roadmap?

It should be an option to not show the unselected plots.