Usage
Click the show in - out toggle button to activate it. Click the toggle button again to deactivate it.
Comments
The derivatives will be displayed as small arrows pointing away from the control points. For each point there are 2 arrows: one for incoming and one for outgoing derivative. When this toggle button is active, the direction of the arrows can be changed interactively by selecting move and then clicking on the arrows. The in- and out-going arrows are linked when continuity is active.
See also
move, in, out, continuity
