Move your phone: spatial input-based document zoom & pan on mobile displays revisited.

We present a document navigation technique for mobile displays that relies entirely on principles of spatial manipulation, such as lifting the display up/down to zoom. While the underlying concepts are not new, the goal of this interactivity is to demonstrate the potential of spatial input-based navigation on state-of-the-art mobile displays. For this purpose, we implemented two carefully optimized prototypes using popular consumer hardware (iPhone and iPad). We originally developed these prototypes for a comprehensive user study [4], in which we found overwhelming proof that spatial manipulation can -- if designed and implemented properly -- outperform conventional multi-touch-based 2D document navigation. These findings could be of interest for future interaction designs of mobile devices. With this interactivity, we want to share our hands-on experiences with the CHI community.