Within 'Diagrams Dashboard,' users can create a new diagram by clicking the ‘[icon name="circle-plus" prefix="far"] Create Diagram’ button in the top right corner of the page.

Clicking the ‘[icon name="circle-plus" prefix="far"] Create Diagram’ button will open the Create Diagram dialog where you will be directed through the process of creating a new diagram.
Create a Use Case Diagram
- Choose Which Type of Diagram to Create
On step 1, select 'Use Case Diagram,' under 'SysML,' as your diagram type.Click the 'Next' button.
- Specify New Root Action Information
On step 2, you will be prompted to input a diagram 'Name,' 'Number' (optional), and 'Description' (optional). Then, click the 'Finish' button to save and automatically open your new Use Case Diagram.