You can access the hierarchy of the SAP models directly from the initial screen of the Data Modeler. As this hierarchy contains all application models supplied by SAP, you can quickly gain an overview of the models and navigate to any specific model you are interested in.
How to...
access the hierarchy of the SAP ModelOther subjects:
Access from the menu Access from the Object Browser of the ABAP/4 Development Workbench Access from the ABAP/4 Repository Information System