Hi there,I'm having the same issue every time I try to edit ( add / remove / stretch vertex ) on 3D or 2D polyline that are overlapped.The thing is, imagine that you have several 3D polylines overlapped, and you want to add a vertex at the same time to all of them ( because they are overlapped ) why can't this be possible?! I manage to do this one by one, but is not possible to select all and do the same?This would be very useful because if I do this for each one is real time consuming.Thanks you some much for your support.Paulo