"Assistants are a really convenient way to structure your drawing. But sometimes, it can get a little bit cluttered... If we would put the assistants in layers, you can enable and disable them per layer. Maybe we can even make it possible to have an assistant layer that only gets activated when you're working in a particular group layer. Much more convenient! Especially if you've got a comic book page with perspective assistants per frame!"

Implies:

• Node for assistants.
• Treat this as an assistant group.
• Maybe even have snapping and previews only work if working in the same group as an assistant layer?

Notes:

• Want.
• There's quite a few smaller bugs with assistants too, like image-wide transforms not working.
• We should also look into what to do with the assistant files that Linux can make.