I have a lot of pairs of keyframes, that both need to stay on the same value. A way to link two keyframes to each other and being able to change the value of two keyframes as one would be great.
thanks so much for this feature request. Can totally see its usefulness
In the meantime, a workaround that comes to mind is using the keyframe label colors as a way to change the value of multiple keyframes at once.
Color each set of same value keyframes with the same color and you can use select all keyframes with the same label color using several different techniques and then Right Click on one > Edit Value to change all of them at once.
Of course, this is most helpful if you have a lot of keyframes that are the same value.