Moving a Control Point
To change the position of a control point of a spline:
1. Click Control Spline in Geometry.
2. Click Modify Point in Control Spline.
3. Click Change in Modify Point.
4. Click the spline you want to modify.
5. Click the control point you want to move.
6. Click the new position of the control point.
When you move a control point, the shape of the spline changes accordingly.