It's the moment you've all been waiting for! Just follow these simple steps: Drag the circle on point A to the one on point B. Drag it by the white dot in the middle for best results. Then, it will tell you whether you're online/in presentation mode or offline and not in presentation mode. Downloading is a good idea, obviously, so that you can test the offline functions. Tell your friends (or even your enemies, because this is the first working online/offline sensor that I know of, and maybe the only one you know too.