In a curve, each invidivcontrol point has a value called Tilt. Changing the tilt will essentially "twist" the part of the curve. To change the tilt I simply select a control point, and change the tilt value in the N menu. To change the tilt value of multiple control points at once, I just select all and change it in the same way.
The tilt value of an individual control point can be animated. However, when I select all the control points, the tilt value loses its ability to be animated.
Is there a way to animate the tilt value of all control points without doing it one by one?