To Create an Offset of a Free Curve
1. In the Model Tree, select the Style feature that contains the free curve, and then right-click and choose Edit Definition. The Style tab opens.
2. Click Style > Curve > Offset Curve. The Offset Curve tab opens.
3. Click the Curves collector, and select one or more free curves to offset.
4. To set the direction to offset the curve, click the Direction plane collector, and then select a plane.
5. To set the distance to offset the curve, type a value in the Distance box, or drag the handle on the curve. Optionally, click to export the parameter value to edit outside of Style.
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Typing a negative value in the Distance box reverses the direction of the offset.
6. To offset the curve perpendicular to the reference plane, click Normal.
7. Click OK.