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Is there a way to create a keyboard shortcut for making a layer the next/previous group color?

I think I made this work, but now I'm not able to find it anymore...

I can't find it either, not sure if this is possible.

In the "new layer presets" it is possible to link a group color with a type of new layer,
but as far as i can tell that is the only place where you can automate a groupcolor setting.

I found it!
But it actually was a George script I probably got from someone here at the forum

Probably a Svengali or Mads Juul script or Nathan Otano. Do you remember the name of the script or can you copy & paste the george script ?

I don't remember who gave me the script. I got a couple from Svengali.
So it was probably him.

If anyone's interested, I can share them. I don't expect the creator to keep it for myself, right?