Because of the way information is correlated with items in 3D models, additional relationships have been added to allow you to show a portion of the model by selecting a related piece and using a Show command on the shortcut menu.
When navigating in isometric and orthographic drawings produced by Smart 3D, you can select parts, but not features. Because features are correlated in Smart 3D, it is necessary to be able to select features and view them in the model. You can now use a relationship to select the part, and from that selection, show the features associated with it.
When you have selected a part in the View and Markup window, the Show Defining Features command is available from the shortcut menu. Use that command to select the feature rather than the part.
Once a feature is selected, a shortcut menu option is available to get the associated parts. Right-click the feature and select the Show Parts option.
Similarly, you are not able to select a pipe run from the drawing view. However, once you have selected a part, the Show Path Run command is available on the shortcut menu, allowing you to get the pipe run to view in the model. Once you have selected the pipe run, the Show Parts command is available on the shortcut menu.