PowerPoint 2011 has several views for editing and viewing presentations, and Presenter View is one of them. This view has been completely overhauled in PowerPoint 2011 — Presenter View no longer requires two displays. This is great since you can test this view without working on a dual display environment (such as a laptop-projector combo workspace). Of course, the actual reason for Presenter View’s existence is still for two displays, and you can continue using it that way.
Learn about Presenter View in PowerPoint 2011 for Mac.

