Extended use case

1. Create an actor through diagram toolbar
2. Name the newly created actor as User
3. Press User's resource icon Association -> Use Case and drag it out to create a use case
4. Name the newly created use case as Withdraw Cash
5. Press Withdraw Cash's resource icon Extend -> Use Case and drag it out to create another use case
6. Name the use case as Read ATM Guide
7. Double click on Extension Points
8. Name the Extension Points as Help

Elaborating use case using sequence diagram

1. Right click on Withdraw Cash and select Sub Diagrams > Sequence Diagram > Create Sequence Diagram
2. Move the mouse over User and press its resource icon Message -> LifeLine and drag it out
3. Name the newly created lifeline as ATM system
4. Complete the sequence diagram
5. Turn back to the previous use case diagram
6. Move the mouse over Withdraw Cash's Sub Diagrams and select Withdraw Cash from the pop-up menu
7. Jump to Withdraw Cash sequence diagram

Business use case

1. Right click on Withdraw Cash use case and select Model Element Properties > Business Model