- Click the Models tab in the module menu.
- On the left you can see all the Model stacks available for the project you are in.
- Select the model or models you want to view by clicking it.
- You can remove a model from the viewer by clicking it.
You can view as many models from the stack as you need to. This is called federating, which simply means loading, and therefore overlaying, multiple models together. Normally you'd load the different disciplines for a model into one federated view of the entire building.