# Edit surfaces

Edit surfaces with control points and by changing the surface structure.

## Turn surface control points on

Display curve and surface control points.

## Insert or remove control points

Add control points to a curve or a row of control points to a surface.

Add knots to curves or surfaces.

## Change control point structure

Change the degree of the polynomial that defines the curve or surface by adding or subtracting control points between knot spans, while maintaining the knot structure.

Control whether surface creation commands divide creased surfaces into polysurfaces.

Reduce the number of surface control points.

Insert a kink at the start/end of a curve or surface.

Remove the kink from the start/end of a curve or surface.

Reconstruct curves, surfaces, and extrusion objects to a specified degree and control point number.

Restore surface edges to their surface.

Reconstruct surfaces to a specified control point number in the u or v directions.

Contract the underlying untrimmed surface close to trimming boundaries.

Contract the underlying untrimmed surface as close as possible to the trimming boundaries.

Average the positions of curve and surface and mesh vertices and evens out the spacing to remove unwanted detail and loops.

Change the location where the start and end edges meet on a closed surface.

Edit the weight of a curve or surface control point.

## Change the surface

Adjust the shape of a curve at its end or a surface near an untrimmed edge.

Project surface edges onto the construction plane to create planar curves.

Move the surrounding surface area smoothly relative to the distance.

Flatten a surface without restriction to single-directional curvature.

Connect curves, surface edges, or surfaces to form a single object.

Join two naked edges that are out of tolerance.

Adjust a surface edge to have continuity with another surface edge.

Merge all possible edges of a surface or polysurface.

Combine adjacent edges of the same surface.

Combine two surfaces at untrimmed edges.

## See also

Undo and redo actions

Extend curves and surfaces

Fillet, blend, or chamfer between curves and surfaces

Split and trim curves and surfaces

Edit solid objects

Create surfaces

Rhino for Mac © 2010-2017 Robert McNeel & Associates. 24-Oct-2017