> ## Model Tree

> The Model Tree displays the model’s hierarchy, inter-relation of different parts, assemblies, bodies, and missing XRef notifications. With the tree, you can select different parts and modify their attributes such as color, visibility, render mode or transformation.

> ## Expanding/Collapsing the Model Tree

> You can expand the Model Tree to display child entities of a selected node or nodes.

> Note: You can also can configure the level you want to expand the Model Tree.

> See Configuring AutoVue for 3D Files

> 1. Click the Models tab.
> 2. From the Model Tree, select the node or nodes that you want to expand, then right-click and select Expand All Children.

> Note: To select more than one node, press the Shift or Control key while selecting.

> The selected entities are highlighted. The Model Tree expands displaying the child entities of the selected nodes.

> 3. To collapse a node, select the node, then right-click and select Collapse All Children.

> The Model Tree collapses the selected node.

> You can also expand a node by clicking . To collapse a node click .

> ## Missing XRef Notification Icon

> If there are missing XRefs, the Missing XRef Notification icon appears in the Model Tree to the left of the missing XRef. To view the missing XRefs, do the following:

> 1. From the status bar, click the Resource icon .

> The Properties dialog box appears.

> Note: You can also view the missing XRef from the File menu, and then selecting Properties.

> 2. Click the Resource Information tab.

> The missing XRefs appear in the External Reference File Reference File Resources section of the dialog box.

> 3. Click OK to close the dialog box.

> See Displaying Details About Missing Resources

> ## Selecting Model Parts from the Model Tree

> 1. Click the Models tab.
> 2. Select the part or parts from the Model tree.

> Note: To select more than one model part, press the Shift or Control key while selecting.

> The selected part or parts appear highlighted on the model and in the Model Tree.

> ## Hiding Model Parts

> You can hide specific parts of a model or display specific parts and hide the rest of the model.

> 1. Select the part or parts on the model or from the Model Tree.

> Note: To select more than one model part, press the Shift or Control key while selecting.

> The selected part or parts appear highlighted on the model and in the Model Tree.

> 2. To hide the selected part or parts, right-click a selected part on the model or from the Model Tree and select Hide.

> The selected part or parts are hidden on the model.

> 3. To display the selected part or parts and hide the rest of the model, right-click a selected part on the model or from the Model Tree and select Hide Rest.

> The selected parts are displayed in the workspace and the rest of the model is hidden.

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