| To... | Do this | 
|---|---|
| Split a curve at some point. | Select the curve point at which you want to split the curve and choose Edit Curves > Detach Curves. When construction history is on, you can select the detach node and use the Show Manipulator tool to edit the detach point. | 
| Split a surface at an isoparm. | Select the isoparm at which you want to split the surface and choose Edit NURBS > Detach Surfaces. You can select multiple isoparms to split the surface into multiple parts. | 
| Split a curve wherever it crosses another curve in a view. | Select the curves in the view where they overlap, then choose Edit Curves > Cut Curve. You cannot split a curve with an isoparm or curve-on-surface. Use Edit Curves > Duplicate Surface Curves to create an new curve from the isoparm or curve-on-surface you want to use. |