(3D only) Used to stitch two or more open surfaces (extruded surfaces, surfaces of revolution, B-spline surfaces, shapes, or planar complex shapes) into one surface, along their abutting edges. The surfaces and shapes can be stitched with a selection set. If the stitched surfaces create a closed shape the shape will be converted to a SmartSolid.

You can access this tool from the following:

• Ribbon: Modeling > Surfaces > Modify Surfaces > Stitch/Combine > Stitch Surfaces
• Toolbox: Modify Surfaces