To Create a Fan Curve Offset
To create a fan curve offset, you must first set the configuration option enable_offset_fan_curve to yes. It is set to no by default.
1. Select a curve and click
Model >
Offset. The curve is highlighted, and the
Offset tab opens. The selected curve appears in the
Offset curve collector on the
References tab.
|  If you are using a chain set as a reference and you want to modify it, click Details on the References tab and use the Chain dialog box. |
2. Select
to create a fan curve offset.
3. Click the Reference quilt collector and select a quilt or surface to act as a reference for the offset curve.
4. Click the Second reference curve collector and select a second curve as a reference.
| To create another curve, pause the Offset Curve tool by clicking  . Create another curve and click  to resume the Offset Curve tool. |
5. Click the Measurement plane collector and select a measurement plane.
6. Type the number of curves you want to create in the
box.
7. Click
to complete the offset curve.