Align surface edges

To align surfaces

Select an edge on the first surface.
-select an isoparm on the other surface. You can align the edge of the first surface to any isoparm on the second surface.
Select Edit NURBS > Align Surfaces.

Limitations

You cannot align edges that are closed or periodic.
You cannot align a surface to itself.
Exact tangency or curvature continuity cannot be guaranteed if surfaces are rational.
You cannot align to a trimmed edge. Align Surfaces uses the original surface edge, not its trimmed shape.