Creating expand/collapse trees in Pages

I'd like to make a list where it's possible to expand or collapse parts of the list. I envision it using the arrows that point down to reveal the expanded list or right to collapse the list and when you click on the arrow it swaps between the two. Is this possible in Pages, or is there another application I should be using. I can't seem to figure out how to do it.
Message was edited by: sdoigsd

Omni Outliner does perfectly what You want.

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