Before you begin You have a Talend Data Catalog Advanced Plus license edition. You have been assigned an Editor security role. Procedure Open the details page of the physical data model. From the Subject Areas tab, select a subject area. You can also select a diagram from the Related Diagrams tab. Select a diagram from the Diagrams tab. In the Graphical View tab, click the Start editing button. Edit the diagram. Save your changes and click Stop editing.