You can't do this with the built-in tools, but you should be able to acheive the same effect by using a setInterval (set the interval on button press), and advancing your playhead to the next frame at each tick of the setInterval. Once your playhead has reached the end of the timeline, clear the interval.
See the API docs- you may want to leverage sym.getDuration();, to get the length of the timeline you'll be scrubbing. You'll also be leveraging sym.stop(incrementalPositionToStop);
Thanks for your help! I understand what you are saying to do. I'm just starting to pick up code so I'll have to work on it.
Cool, no problem! Let us know how it goes.