Design of shadows on the OHP metaphor-based presentation interface which visualizes a presenter's actions

Abstract

We describe the design of shadows of an overhead projector (OHP) metaphor-based presentation interface that visualizes a presenter's action. Our interface work with graphics tablet devices. It superimposes a pen-shaped shadow based on position, altitude and azimuth of a pen. A presenter can easily point the slide with the shadow. Moreover, an audience can observe the presenter's actions by the shadow. We performed two presentations using a prototype system and gather feedback from them. We decided on the design of the shadows on the basis of the feedback. © 2011 Springer-Verlag.