About Advanced Surface Features
Use > to create the following advanced surface features:
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Boundary Blend—Creates boundary blended surfaces between reference entities that define the surface in one or two directions.
Boundary Blend—Creates boundary blended surfaces between reference entities that define the surface in one or two directions.• 
Vertex Round—Trims a surface by rounding an outer surface edge.
Vertex Round—Trims a surface by rounding an outer surface edge.• Blend Tangent to Surfaces—Creates a surface as a blend from an edge or a curve to tangent surfaces.
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Flatten Quilt—Creates a flattened quilt.
Flatten Quilt—Creates a flattened quilt.• 
Flatten-Quilt Deformation—Bends flattened quilts or flattens bent quilts.
Flatten-Quilt Deformation—Bends flattened quilts or flattens bent quilts.Add the following commands to the ribbon to create additional types of surface features.
• Blend from File—Creates a blended surface from a file.
• Blend Section To Surfaces—Creates a quilt as a blend from a section to tangent surfaces.
• Blend Between Surfaces—Creates a quilt as a blend from a surface to tangent surfaces.
• Conic Surface and N-sided Patch—Creates a conic quilt and creates a quilt from more than four boundaries.
• Surface Free Form—Creates a surface by dynamic manipulation.