You are prompted with the start and end points of the system axis. This applies to all linear elements, including curved beams.
Straight axis are defined by 2 points with following syntax “0,0,0->1500,0,0” and curved beam axis are defined by 3 points “0,0,0->1500,1500,0->3000,0,0”, where the middle point represents the midpoint of the curved beam.