Use this option to align the Setup relative to the part geometry.
Z Direction — Click the Pick Direction button and in the Graphics window, select an edge or surface to define the Setup's Z direction.
X Direction — Click the Pick Direction button and in the Graphics window, select an edge or surface to define the Setup's X direction.
Location — Click the Pick Location button and in the Graphics window, select where you want to position the Setup. If you are using the center of a revolved surface, you can click Opposite End to create the Setup at the other end of the cylinder.