The Outliner is used to view your Group and Component hierarchies as a hierarchical tree. This feature is great for navigating through large models, restructuring the model hierarchy, locating instances of a particular component, or renaming groups and components. Activate the Outliner dialog box from the Window menu. The following image shows a screenshot of the Outliner on Microsoft Windows:

Identifying Entries in the Outliner Hierarchy

Moving Items Within the Outliner

Filtering Groups and Components in the Hierarchical View

Naming Groups and Components Within the Outliner