Animation scripts created with the Animation Producer (Visualization workflow > Animate tab > Script group > Animation Producer) can be used to specify geometry or camera motion that can be exported to U3D and viewed dynamically within the PDF document. When a model is saved to U3D either the default script (a file with same name as design file but ".msa") extension, or the script currently loaded in the animator, is used to specify the U3D animation. In Adobe Reader, the animation can be started or paused by selecting the 3D object and then selecting the "Start Animation" or "Pause Animation" buttons from the tool bar.