default info for all models and objects

In Advanced the customers can define their own method, but they can't adapt the portal layout. Which basically means that the layout template should be created as something to support a very generic use case.

For models, the diagram can always be shown, but this reduces the power of Advanced to the good old Publisher where it was just about the diagrams.
With current configuration, when users click through on a model or an object they often end up on a blank overview page. To avoid this default information for a model or object can be configured, next to the description.

For a model this could be an overview of all the objects that occur in the model - with their description and type.

For an object this could be the overview of all occurrences of that object. And maybe even all relationships.