Set the Default Diagram
A project might have a default diagram. If set, this diagram loads when Enterprise Architect first opens the model.
It is often convenient to place hyperlinks to other diagrams and resources on the default diagram, thus creating a Home Page for your model.
To set the currently active diagram as the model default, select the Diagram | Make Model Default menu option. (Also use this option to cancel the default setting.)
Once you have specified a default diagram, the Home icon on the Diagram toolbar takes you back to that diagram from your current location in the model.