The language on various Split/Move instructions wasn't clear to me. Here is what I've found.
The Split/Move key
Split = press the split/move key (press and release it).
Move = hold the split/move key (press it down and hold it down).
Split Undo = double press the split/move key (pres and release it twice, this essentially does nothing).
Split & Move = double press and hold the split/move key (press and release, then press and hold it down).
The last action will add a split, and then keep the right side of the clip selected to to be moved. On multiple tracks this will split all tracks and hold the clip you are last track you were working from.