Would it be possible to setup the most simple example possible, with one straight and horizontal timeline that would drive the abscissa of points on any other curves of the project ?
I mean, like a classical example of vertical values versus horizontal time ?
Yes, you can edit 2D-curve (don’t forget to reset orientation if you’re in 3D with Alt+Dble Click). Select the curve and move points or Bezier control-points.
Shorcuts are in documentation if you need them!