Create an arc blend curve between two curves.

Connect two curves with continuity control.

Connect two curves maintaining continuity.

Create a line segment between two curves and trims or extends the curves to meet it.

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.

Close open curves.

Extend and trim curves to meet at their endpoints.

Continue to draw the selected curve using control points.

Continue to draw the selected curve interpolating through picked points.

Change a curve to polyline segments.

Change a curve to arc segments.

Create a curve by averaging two input curves that are planar in two different views.

Change the seam (start/end) location on closed curves.

Place a point object at the start of a curve.

Place a point object at the end of a curve.

Create cross-section curves through profile curves.

Trim, split, and join curves based on their overlapping regions.

Link to Curve From Object toolbar

Remove a portion of a curve that is between two locations.

Lengthen a curve.

Link to Extend toolbar

Separate or duplicate polycurve segments.

Remove large curvature variations in a curve while limiting the geometry changes to the specified tolerance.

Add an arc between two curves and trims or extends the curves to the arc.

Round polyline corners with arcs.

Make a non-rational NURBS curve of a specified degree that matches the input curve to within the specified tolerance.

Flatten the curve segment between picked points.

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

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

Make the object knot vectors uniform without changing the control point locations.

Change a curve end to meet another curve or surface edge with a specified continuity.

Change a curve's direction to match another curve's direction.

Copy a curve parallel to the original.

Copy curves or surface edges parallel to the original.

Copy a curve on a surface parallel to the original.

Copy a curve on a surface parallel to the original in the surface normal direction.

Project curves/points toward a construction plane to intersect a surface.

Link to Curve From Object toolbar

Project curves/points toward a construction plane to intersect a surface using the Loose option.

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

Rebuild curves to match a master curve.

Interactively modify selected curves by non-uniformly re-spacing the control points.

Remove multiple knots from curves and surfaces.

Replace each curve segment that has the geometry of a line or an arc with a true line or arc.

Shorten a curve to the new picked endpoints and select.

Copy a shortened curve.

Mirror a copy of a curve or surface with continuity.

Create curves between two open or closed input curves.

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