Request for 2 or more colour picker

[KianLing]

Hi,

I have a thick line chart with three data sets, and I'm having trouble selecting the whole line when it crosses over itself. The current color picker is not able to accurately pick the entire line, even when I tested it with the background color picker and adjust algorithm. Is there another way to select the entire line? Thank you.

[nbehrnd]

@KianLing To ease replication and check if a modified approach does trade process the raw data better: can you share a typical illustration where this problem is observed?