The PowerDesigner requirements model provides various means for customizing and controlling your modeling environment.
Setting Model Options
You can set RQM model options by selecting Tools > Model Options or right-clicking the diagram background and selecting Model Options.
Extending your Modeling Environment
You can customize and extend PowerDesigner metaclasses, parameters, and file generation with extensions, which can be stored as part of your model or in separate extension files (*.xem) for reuse with other models.
Linking Objects with Traceability Links
You can create traceability links to show any kind of relationship between two model objects (including between objects in different models) via the Traceability Links tab of the object's property sheet. These links are used for documentation purposes only, and are not interpreted or checked by PowerDesigner.