Command \umlusecase

You can define a use case with the \umlusecase command:

\umlusecase[x=0, y=0]{case1}
\umlusecase[x=3, y=1]{case2}

Both options x and y allow you to place the use case in the picture or in the container system. The default value is 0. The text argument is the label of the use case. The node representing the use case has a default name, based on a global counter, that is like usecase-17. For practical reasons, you can rename it thanks to the name option.

Furthermore, you can set the width of the use case with the width option.