You can include entity relationship diagrams (ERDs) in a legacy application document.
    By capturing class and property relationships for the case types and data types in your
    application, you can help stakeholders understand the implementation of your
    application.
    - 
        If you plan on viewing ERDs in the documents that you generate, ensure that your client has Microsoft Visio installed.
      
- 
        
          Click
          
            Designer Studio
            > Application > Tools > Document
          
          to open the Document Application tool.
        
      
- 
         In the Saved legacy document settings section, click the saved
          settings for an application document. 
      
- 
        
          In the Level of detail section, click
          Customize.
        
      
- 
        
          On the
          Entity relationships diagrams
          tab, select the
          Include entity relationship diagrams in the document
          check box.
        
      
- 
        
          Select the
          Create/Update
          check box for each case type and class that requires an ERD.
        
      
- 
        
          In the
          Ruleset
          and
          Ruleset version
          fields, enter an unlocked ruleset name and version that contains the generated diagrams.
        
        ERDs are stored in binary file rules as attached .vdx files. 
- 
        
          In the
          Classes
          and
          Properties
          fields, select options that refine the level of detail in each ERD.
        
      
- 
        
          Click
          Create selected.
        
      
- Generate a new document to test the changes.