Oriented In Plane

Dialog boxes where you can set orientation dependencies            Shared Dialog Box
Orients an entity in a plane defined by the location of three Coordinate References, with one of the axes directed along a specified vector in the plane. The three coordinate references define the plane; the directed axis will point in the direction defined from Coordinate Reference 1 to Coordinate Reference 2.
 
For the option:
Do the following:
Coordinate Reference #(1,2,3)
Enter hardpoints or construction frames to determine the orientation plane and direction vector.
Axes
You can select either the z- or x-axis as the directed axis. Regardless of your selection, the XZ (ZX) plane will always be oriented parallel to the plane defined by the three coordinate references. If you select:
ZX - The z-axis will be parallel to the vector defined from Coordinate Reference 1 to Coordinate Reference 2.
XZ - The x-axis will be parallel to the vector defined from Coordinate Reference 1 to Coordinate Reference 2.