The question says it all.
I could not find any documentation where where the slide-up/slide-down could be used. Also, I could not attach any external event to make it happen.
http://javascript.daypilot.org/scheduler/
[Added]
To be more specific, how to slide-up/slide-down when the plus / minus buttons are clicked in http://javascript.daypilot.org/demo/scheduler/ ?