Duplicates any curves that are picked when you click the tool, and any curves you click while the tool is active.
See Create a free curve from existing geometry.
No Rebuild – Do not rebuild the curve after duplicating it.
Curvature, Reduce Spans, Del Multi Knots, Uniform Knots, Match Knots – Rebuild the curve after duplicating it.
See the discussion of the Rebuild Type option of the Rebuild curve tool for information on the rebuild types and their options.
After duplicating, automatically switch to the Smooth tool to allow you to smooth the resulting curve.
Allows you to specify an arbitrary surface isoparametric curve to duplicate, rather than a visible one.
Automatically create a Min-Max deviation comb between the original and duplicated/rebuilt curves.
Automatically update the new curve when the values in the Duplicate Curve window change.