I have a rectangular feature that I want to locate with a basic dimension to the center of the rectangle. The rectangluar feature has a profile tolerance on it.  I have the basic dimension in the drawing but I would also like to have a center mark at the center of the square making in clear that this dimension is going to the center of the square. I have created an Axis in the model through the center but I cannot get this to show up in the drawing in a vew that would be perpendicular to the axis. I can fudge it in the drawing by sketching a circle then making a center mark through the center of the circle. Then I delete the circle and the center mark stays, but this is not at all robust. Anyone have any ideas???

I included a part of the drawing below for reference.