Editing Model Dependency Diagrams
It is also possible to remove from view the models that are irrelevant to the current presentation. So doing, no files are physically deleted.
A new model can be created from a Model Dependency diagram, as described in the section Creating Models.
To add a model to a Model Dependency diagram
Type the name of the desired model in the dialog box that opens.
Select model from the suggestion list, and press Enter.
To drag a model to a Model Dependency diagram
Select the desired model in the Rails view.
Drag and drop the selected model to the Model Dependency diagram background.
To remove elements from view
In the diagram, select one or more elements to be deleted.