Scan Tools > Surface and Curve Manipulation > Modifying Curves > To Modify a Curve Using the Control Polygon
  
To Modify a Curve Using the Control Polygon
1. Click Edit > Modify in Scan Tools.
2. Select a curve to modify. The Modify Curve dialog box opens.
3. Click.
4. Define the movement plane. Select Curve Plane, Defined Plane, or View Plane.
5. Specify the direction for tweaking the curve. You can tweak the curve in one or two directions. Specify directions by choosing from First Direction, Second Direction, or Normal Direction.
6. Select a point and drag it to the new location.
7. Optionally, click Region to define the Poly Motion Region.
8. Optionally, click Diagnostics to enable the dynamic display of the selected analyses.
9. Optionally, click Constraints to set boundary constraints.
10. To use sliders, select a point to drag, click Sliders, and move the sliders in each direction.
11. Click OK to finish the operation.