To Split a Curve
1. In the Model Tree, right-click the Style feature that contains the curve to split, and choose Edit Definition. The Style tab opens.
2. Click Style > Curve Edit. The Curve Edit tab opens.
3. Click the collector, and select a curve.
4. Right-click the point at which you want to split the curve and choose Split from the shortcut menu.
The curve is split at the specified point. The resulting curves change shape as they refit to the new defining points.
5. Click .