The Create Curves toolbox has tools that are used to draw curves of all types from B-splines to Helix curves.

All tools in a toolbox are not always visible by default. To see all tools, right-click in the toolbox and select Show All from the menu.

To	Select in the Create Curves toolbox
Place a B-spline curve.	B-spline by Points
Create a B-spline curve that passes through a set of points while maintaining user-defined tangent directions at those points.	B-spline by Tangents
Place a composite curve, which can have line strings, arcs, or Bézier curves as components.	Composite Curve
Place or construct a complex chain of arcs that passes through a given set of points.	Interpolation by Arcs
Place a parabola, hyperbola, or partial ellipse.	Conic Curve
Place a clothoid or Archimedes or logarithmic spiral.	Spiral Curve
Place a helix in a 3D design.	Helix Curve