Boundary Events always moves to the bottom right corner of the shape attached.
It is difficult to move a Boudnary event to other edges / corners of the shape on which it is to be attached..
Also in some cases we would need multiple boundary events but this is not very practical/feasible since they often shift and placed on top of each other..
Is it possible to make Boundary events easier to drag and attach to any edge or connection-point of the task/shape to which it is to be attached?