List of properties for various symbols

For a newbie Edge person, with no Jquery experience...it is hard to find a list of usable properties for sybols inside animate.

For instance I am trying to control the timeline through vertical scrolling in an scroll action in the stage.

I have seen tutorials where the author inputs things like

var scrollPos = sym.$("Stage").scrollLeft()

where does one find out that .scrollLeft is even an available property,without knowing it through experience?

I am assuming there is a .scrollUp and .scrollDown, but how am I to know...

I have looked at the API and all it says is scroll is a page level DOM....

IS this just information gathered through experience and osmosis...or is there an actual list I can look at...

or is there a debug line of code that I could see all available properties for the Stage symbol etc

thanks