You can display a Use Case using rectangle notation. This displays the Use Case in a rectangle, with an oval in the top right-hand corner. Any attributes, operations or constraints belonging to the Use Case are shown, in the same style as a Class.
To show a Use Case using rectangle notation, right-click on the Use Case object on the diagram and select the Advanced | Use Rectangle Notation context menu option. This setting only applies to the selected Use Case, and can be toggled on and off.
Actor elements can also be displayed using rectangle notation.