With the Outliner in SketchUp you can view a model's groups, components, and section planes in a hierarchical tree. The Outliner panel makes it easy to:Navigate around and identify objects in large models.Name objects and section planes.Find components or section planes.Restructure the model hierarchy.Control the visibility of all objects.The Outliner is a panel. To open the Outliner panel, select Window > Default Tray > Outliner.