Another odd question:
I've got an existing motion path.. I want to move the last keyframe to the same spatial position as the first - no problem (edit value). But I also want the outgoing bezier handle of the first keyframe to be the exact opposite (in length and direction) of the incoming handle of the last keyframe - so they look like a continuous bezier. How can I do that?
Copy&paste the keys to a solid matching the comp size as a closed mask, adjust the mask, copy&paste back to the position, adjust the keyframe timing.