As far as I can read from the OM addendum, once you are in M&J edit page, you need to set the Measure for each of the four M&J point, you can do it by selecting the M&J 1-4 on the screen and pressing [REC] button once you are in the desired measure of the song (instead you can delete it by pressing [PLAY] button so it will appear OFF on the M&J Settings).

To recall the M&J point, press the corresponding [VAR] button, if you set a measure for it and it will execute the Jump...

That's what I understood...hope it helps...