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$EVWUDFW Emphasis is an important vehicle to communicate relevance and to guide user focus, especially in interactive computer graphics. In dynamic 3D systems in particular, emphasis techniques must also consider visibility issues. This work discusses possible solutions and describes an implementation. ,QWURGXFWLRQ Graphics and animation techniques for emphasis always depend on the application context. Our work is focused on interactive presentation systems. These systems are intended for training and documentation purposes and combine computer graphics with AI-based planning methods.