How use emacs to organize idea for a presentation

[Giannandrea Castaldi]

Hi,
I'm using emacs for a while and now I'd like to use it for preparing a 
presentation. Usually I use mind manager, a graphic tool that allows to 
organize ideas as a tree map and easly move nodes.
Now I want to work in text mode with emacs with the possibility of:
* easly move nodes/chapters
* close/expand the content of the nodes

Any suggestion?

Thanks.

Giannandrea