Moving a Control Point
To change the position of a control point of a spline:
1. Click Modify and then in the Draw group, click the arrow next to 
Control.
Control.2. Under Modify Point, click 
Change.
Change.3. Click the spline you want to modify.
4. Click the control point you want to move.
5. Click the new position of the control point.
When you move a control point, the shape of the spline changes accordingly.