| The decreasing cost of projectors has enabled the creation of high resolution wall-sized displays by tiling multiple projectors together. Wall displays are interesting from an interaction perspective since their extended surface and high resolution allow the presentation of large amounts of data that may be viewed and interacted upon at close proximity. These characteristics also give rise to some unique challenges that we explore in three interaction design explorations: organizing the layout of content spread across large distances can be tiresome, repeated reaching for simple selection tasks can be tedious, while tracking visual changes across the display surface may prove problematic.;In the second design exploration we present and evaluate in a pilot user study a set of new techniques, which facilitate access to areas of the display that are difficult to reach without significant physical movement, by copying remote content close to the user. Through our findings we identify desirable design properties specifically for remote reaching designs, used to refine our most promising technique. The refined technique outperformed existing approaches in multiple target selection tasks.;Our last exploration aids the identification and understanding of dynamic visual changes happening out of the user's sight. We propose a mechanism for storing and revealing hidden changes, explore its design space, and perform an informal user feedback session on a wall display prototype. Users preferred the technique to no buffering for a game task and chose the buffered history to be presented both statically and as an animation.;Individually, each design exploration contributes significantly to the specific interaction aspect it investigates. Together, they demonstrate how careful design may lead to general-purpose techniques that can benefit any type of application performed on wall-sized displays.;In the first design exploration, layout management and context switching is achieved using alternative views of different areas on the display. We introduce a new framework, used first to instantiate examples of existing techniques, and then as a catalyst for developing three new ones. The most promising new technique was preferred to traditional approaches by the majority of users when performing a layout management, comparison and context switching task. |
