Mac Powerpoint – multi screen usage with one screen for presentation only

After delivering a lot of trainings globally I have been using my loyal Mac Book Pro all the time. One thing that always annoyed me was the inability to use my MacBook Pro’s screen open to anything I want to do while on the projector my slides are appearing in full screen. With Mac Office 2012 you get the Presenter window but still you cant use your laptop screen for anything else like browsing etc. The moment you touch the slide show option the presentation slide show stops from both screens. This created problems as usually we could not then work on the laptop screen if you have the OFfice...