The Edit Use Cases command, accessed on the Diagram ribbon, allows you to manipulate the collection of child use cases for the current selection (or, if no use case is currently selected, the main use case represented by the diagram). The command opens a target window on the includes relation from which you can add or remove use cases as desired.
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If you simply wish to add a use case to a node or the diagram, often this can be accomplished most quickly by dragging and dropping from the diagram Toolbox - either by dragging the Use Cases construct from the Insert tab or by dragging the specific use case to be added from the Key Entities tab. |