A graphical, hierarchical representation of the assembly is shown in the Model Tree window. The nodes of the Model Tree represent the subassemblies, parts and features that make up an assembly. Icons, or glyphs, provide additional information. You can expand or compress the tree display by clicking on the triangle next to the name of the component.

The Model Tree can be used as a selection tool, allowing objects to be quickly identified and selected for various component and feature operations. In addition, system-defined information columns can be used to display information about components and features in the Model Tree.

In the top-level assembly, a green line indicates the place in the Model Tree where the next feature or component is added. You can drag the line to a different location to add components or features. See the Related Link below for more information. A blue line with a ball indicates the place in a part or subassembly where the next feature or component is added. You can drag the line to a different location to edit the part or subassembly. When you move the green or blue line, the components and features below the line appear dimmed. Limited operations are available for these components and features on the shortcut menu.

The shortcut menu on an item in the Model Tree provides direct access to operations applicable to the current selection.