I was thinking that you had said that only showing one or the other and not both at the same time, as in the video. But now that you bring that up, I can see how this could be problematic with "selecting an oncurve point along with a hull point" at the same time.... Good note..

Thanks again for looking at this.....

related with all this :)
Does it possible to "join" a point to a curve even this last is moving when control points of the curve are moving?
Actually a point is not "joined" even you uses the command "join" !

Hi Pilou - the Join command knows how to join curves together into larger composite curves or surfaces together into multi-face or solid objects. There is no functionality in Join for joining a point to anything else.

I guess you want to have a kind of "Persistent point on curve" - a point that is located at a particular parameter value of a curve and moves with the curve when you edit it? MoI does not currently have anything set up for that.

- Michael