Creating a system boundary box

The system boundary box must be the first element placed in a use-case diagram. It distinguishes the border between use cases and actors (use cases are inside the borders of the system boundary box and actors are outside of it).

1. Click the Boundary box button .
2. Click once in the drawing area. Rhapsody® creates a boundary box named System Boundary Box. Alternatively, click-and-drag with the mouse to draw the system boundary box.