When selecting two points that are coincident to each other is there a good way to determine which point you have selected? For example if you have two sketch lines (sketch line A and B) and their end points are coincident to each other and then you add a third sketch line (C) and make its end point coincident to the end points of A and B which entities actually have the relation added? Did C get related to A or B? How can the user determine which entities are related to each other?