To view the trajectory of an animated object:
-  Select the object, and click the Trajectories button at the top of the Viewer window. 

Viewer window A. Trajectories menu B. Trajectories button
 
  
- Click the down arrow next to the Trajectories button to open the Trajectories menu and select one of the following: 
- To view trajectories for all selected objects, select Auto-Selection. 
 
- To view trajectories even when objects are not selected, select Set on Selection. 
 
- To hide the trajectories of selected models, select Clear on Selection. 
 
- To hide all trajectories, select Clear all.