You can use the Add 3D Comment tool to add a 3D comment to a particular part of a 3D model, for example, to provide the coordinate information or the name of the part. A 3D comment contains a text box and a connector line that connects the text box and the part of the 3D model you want to comment on. 

With the 3D Measurement Tool, you can measure the distance between two points and the angle between two edges of a 3D model. 

With the Add 3D command in the Edit tab, you can insert a 3D model (in U3D or PRC format) to a PDF page. You are also allowed to directly convert a .dwg file to a 3D PDF. See also Convert Model to 3D PDF.

To add a 3D model to a page, do the following:

With multiple views created, you can use the Manage Views dialog box to perform view management. You can reorder the views in the View pane of the Model Tree panel or in the Views list on the 3D toolbar, delete a view, and set a view as the default view. 

Click on the Views list on the 3D toolbar and choose Manage Views… to open the Manage Views dialog box. Then do any of the following:

1. Customize the view as needed. For example, specify the parts to show or hide in the view, and use the tools in the 3D toolbar to set how the parts are displayed.   
2. When you’re done, click the Create View icon in the View pane of the Model Tree panel. (Alternatively, you can click on the Views list in the 3D toolbar and choose Manage Views… from the drop-down menu.

In the View pane of the Model Tree panel: 

On the 3D toolbar (or after right-clicking the 3D model and choosing Tools), select Camera Properties to define the precise angle and positioning for a view of a 3D object. The camera properties can be saved as presets, which can be used across views and files.

From the 3D toolbar (or after right-clicking the 3D model and choosing View Options), choose an option as appropriate to modify the display settings for a 3D model.

• Use Orthographic/Perspective Projection

  Click the Use Orthographic/Perspective Projection icon on the 3D toolbar to toggle between displaying perspective and orthographic projection of the 3D model.

• Model Render Mode

On the 3D toolbar (or after right-clicking the 3D model and choosing Tools), select a desired 3D navigation tool to manipulate the 3D model. 

• Rotate

  Rotating a 3D model allows you to turn it around in the desired direction. Click the model, hold the left mouse button, and move the mouse in the direction you want it to rotate.

• Spin

When the 3D model is enabled, click the Model Tree panel in the navigation pane, where you can view the 3D scene structure and the preset views. Check/uncheck the appropriate checkbox to show/hide the corresponding part of the 3D content. You can also click the Toggle Model Tree icon on the 3D toolbar to show or hide the Mode Tree panel.

The Model Tree panel contains three panes: the Structure pane, the View pane, and the Object Data pane.