Hi Will,

> actually I felt my idea of displaying open curves in one color and
> closed ones in another was a perfect solution to this; immediate feedback
> as to the type of curve you're working with.

There's no doubt that it would immediately visually distinguish those types of curves. But I guess that my concern would be that someone would see that curves were being differentiated somehow but not really understand immediately what was the basis for the differences. That can kind of lead to a sort of "huh?" type feeling...

I've been pretty conservative with trying not to use too many different colors for different things because for version 2.0 I want to enable you to assign your own colors to different curves to help in visually grouping them by your own schemes.

- Michael