To Create a Bspline Curve that Passes Through a Set of Data Points with Interactively Specified Tangent Directions

Select the Bspline by Tangents tool ( split button).

In the tool settings window, set Input By to Entering Tangents.

Enter a data point to define the curve's starting point.

Enter a data point to define the tangent direction at the defined starting point.

Enter a data point to define the next point through which the curve will pass.

Enter a data point to define the tangent direction at the point defined in the previous step.

For each additional point through which the curve will pass, repeat steps 56.

Reset to generate the curve.