Hi Will, yup a couple of good ideas there.

I was thinking of possibly a larger outline might be a good thing to try as well, it will probably take some experimentation with a few different ideas to get a good result.

One other thing is that it would be good to have some various different ways to mark points as well, like mark the start/end point of a curve, mark tangent corner points somehow, etc... So it would be good to think of a system that would fit into that, rather than a system that would conflict with adding some different markers later.

Maybe these different things could all use the same marker, but there would be a UI somewhere where you could control which was currently set to be active...

It will probably take a fair amount of design effort to do a really proper job of this.

- Michael