This task shows you how to create a 3D curve that
is offset from a reference curve.
Click 3D Curve Offset
Select the reference Curve to be offset.
Select the offset Pulling Direction.
Specify the Offset value by entering a value
or using the spinners.
Click Preview to see the offset curve.
if the curvature radius of the input curve is smaller than the
offset value, 3D corner curves are created to fill the holes
Tension: for the 3D corner curves, if needed
3D Curve Offset with a tension of 0.3 and a radius
of 20 mm :