The Model Viewer tab on the Design Explorer lists all the feature classes in the industry model in your design drawing (Model Mode). You can toggle the display to list only the feature classes used in your design (Design Mode).
Most feature classes have so many unique models that they cannot all be displayed easily. The Model Viewer provides a way to sort models into groups based on common attribute values such as Phase or kVA.
For more information, see To Convert an Existing Nondesign Feature or Object to a Design Feature (Model Viewer).
To modify a feature class style, see To Configure the Industry Model.
The Base Maps section of the Model Viewer lists the attached drawings, connected data, and surfaces used as base map information in your design. You can show and hide this information in your design.