To Construct a Curve Defined by Equations and Another Curve
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In the Curve by Formula dialog (
split button), load a curve definition.
![](GUID-D36BADEC-4DCA-4915-F99F-7A0C530C11A6-low.png)
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Set Mode to Derived.
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From the Create As option menu, choose Bspline.
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Select the curve in the design.
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Accept the new curve.