Pulling Curve Ends
You can toggle between Tangent and Natural (curvature continuous) extension when dragging the end of a curve. To drag the extension Tangent to the curve, press and hold Ctrl prior to dragging. You can release the Ctrl key once you start dragging. If you do not press Ctrl, the extension is created Curvature Continuous.
- Works for splines (extended or trimmed-back)
- Works for arcs
Example: