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To create an innovative interactive multimedia application, a multimedia designer needs to rapidly explore numerous behavioral design ideas early in the design process, as creating innovative behavior is the cornerstone of creating innovative multimedia. Current tools and techniques do not support a designer's need for early behavior exploration, limiting her ability to rapidly explore and effectively communicate behavioral design ideas. To address this need, we have developed a sketch-based, interactive multimedia storyboard tool that uses a designer's ink strokes and textual annotations as an input design vocabulary. By operationalizing this vocabulary, the tool transforms an otherwise static sketch into a working example. The behavioral sketch can be quickly edited using gestures and an expressive visual language. By enabling a designer to explore and communicate behavioral design ideas using working …