Although a wide range of free and commercial presentation systems such as PowerPoint, Impress or Keynote are available, many research groups develop their individual presentation system for higher education. The paper focuses on the handling of multiple presentation streams within such systems and identifies relevant system features. Our approach for creating versatile presentation environments is presented in detail. It is based on different models that can be hierarchically assigned to each other and represent so-called sessions, presentations, slides and finer structures. For evaluation purposes, different usage scenarios that illustrate parallel handling of presentations are presented and discussed.
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