Can't insert a point into the Datum for a surface profile
So I'm trying to find the surface profile on a blueprint using 3 different datums (plane, line, and a point). Datum A is a plane.. no problems there. Datum B is a line.. no problems there. Datum C is a point and it is not letting me insert a point when trying to get the surface profile to [A][B][C]. Any help on why it's not letting me add a single "point" as a datum for surface profile?? Thanks