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Visual designs can be complex in modern data visualization systems, whichposes special challenges for explaining them to the non-experts. However, fewif any presentation tools are tailored for this purpose. In this study, wepresent Narvis, a slideshow authoring tool designed for introducing datavisualizations to non-experts. Narvis targets two types of end-users: teachers,experts in data visualization who produce tutorials for explaining a datavisualization, and students, non-experts who try to understand visualizationdesigns through tutorials. We present an analysis of requirements through closediscussions with the two types of end-users. The resulting considerations guidethe design and implementation of Narvis. Additionally, to help teachers betterorganize their introduction slideshows, we specify a data visualization as ahierarchical combination of components, which are automatically detected andextracted by Narvis. The teachers craft an introduction slideshow through firstorganizing these components, and then explaining them sequentially. A series oftemplates are provided for adding annotations and animations to improveefficiency during the authoring process. We evaluate Narvis through aqualitative analysis of the authoring experience, and a preliminary evaluationof the generated slideshows.

Narvis: Authoring Narrative Slideshows for Introducing Data Visualization Designs