I want to dim this angle because it's 105° while the other side is 88°, but every time I try to, I get The selected entity could not be converted into a line or circular arc.
It's a tapered recess in a plastic part, so perhaps this is not needed.
I've never done anything in plastic before, so I'm kinda guessing. From what I've read, it does not need to be fully dimmed. But this area, I'm told, is Very Important and I should define it well.