I would also love to see this implemented. I use Goodnotes for UI sketching, and use the workaround of never taking my Apple Pencil off the screen to ensure one area isn't darker than another.
It would be great to have an option to toggle highlight overlapping. That way I can just keep highlighting on the same "Layer" and not worry about picking my pencil up to highlight different areas.
I would also love to see this implemented. I use Goodnotes for UI sketching, and use the workaround of never taking my Apple Pencil off the screen to ensure one area isn't darker than another.
It would be great to have an option to toggle highlight overlapping. That way I can just keep highlighting on the same "Layer" and not worry about picking my pencil up to highlight different areas.