Live Presentations has collaboration backed into the application. This means that not only can you share your presentations with others, you can also edit the same presentation with your contants at the same time, irrespective of where they may be in the world.

You don't have to do anything special to co-edit your presentation. Just open your presentation in your browser or your desktop and edit it the way you normally do. If there is any other user who has opened the same document at the same time, all changes made by the other user are merged into your copy of the presentation in real time.

You can see who else is online on this document by clicking on the "Users" button on the bottom menu. You can also chat with these contacts by clicking on the chat button next to a contact name.