Hi Tony,

> Wouldn't it be even easier to see them, if curves were a different
> colour from edges all the time? :-)

I'm not sure.... But possibly not - it may make for a pretty messy display since the problem tends to occur when the curve and the edge are exactly occupying the same spot.

So either it would be speckled there, or one would "win" and you wouldn't know that there was a stacked up one behind the other one.

I don't think that colors will likely solve the problem, there just is not any particular color that would make someone say "oh, ok - I know that is an edge". It's not like there is an internationally recognized "edge" color like there is for go or stop for example...

I think probably getting some text to pop up when there is this stacked-up situation will probably have the best chance of clearing this issue up.

- Michael