When I try to mirror an object (within the 2D plan view of the model) I am able to define the axis to "flip" the object around by clicking 2 points, why am I not able to do that in an elevation view? When I select "mirror" in the elevation view, the object is mirrored horizontally wherever I make the first click. I am trying to flip an object vertically...is there a way to do that in the elevation window with mirror tool? or do I have to rotate 180?