A Custom diagram is an extended Class diagram that is used to capture requirements, user interfaces or custom-design models.
The below example reflects a Requirements diagram. Requirement elements can be linked back to Use Cases and Components in the system to illustrate how a particular system requirement is met. Change and Defect (Issue) elements look the same as Requirement elements and can be coded and managed in the same way.
Custom models provide a few extensions to the UML model and enable some exploratory and non-rigorous experimentation with model elements and diagrams.
Toolbox Elements and Connectors
Select Custom diagram elements and connectors from the Custom pages of the Toolbox.
Click on the following elements and connectors for more information.