Comment 9 for bug 217029

> I also vote for preserving the curve and putting symmetrical option last

> You could safely assume that changing any node type into cusp is always the best choice. Therefore, I think the better order is:
Cusp -> Symmetric -> Smooth -> Auto -> Cusp

You forget symmetric to smooth which is lossless too.

With [Cusp -> Auto -> Symmetric -> Smooth > Cusp] 2 of 4 steps are lossless

Symmetric -> Smooth -> Auto -> Cusp got 2 of 4 too but I like this sequence less :
 When reworking traced shapes I often want symmetric/smooth turned into cusp ;
 if auto comes into the workflow then the curve will change (what I don't want)

I think order of icons in the "node bar" should be modified accordingly. (I don't know which should come first but the 3 next should follow the "order" (and symmetric and smooth can't be splitted apart IMO))