You can modify use case diagrams to reflect changes in
the system that you are modeling.
Copying and moving model elements
You can copy or move a model element to another model or model element. All the model elements that the selected model element contains, including relationships, are copied or moved along with it.
Sorting model elements
You can change the sort order of the model elements in your model.
Filtering model elements
You can filter the model elements that are displayed
in the Model Explorer view so that you can
see only those that you want to work with.
Organizing model elements into packages
You can use a package to organize model elements in a model. Packages can contain any kind of model element, including other packages.
Documenting model elements
In UML modeling, you can add detailed information to the model elements in your models. This text could include any information that you want documented, such the role, purpose, or behavior of the model element.
Linking model elements to external files
In your UML model, you can link a model element to an
external file, such as a Microsoft® Word
document or a graphic file. This link is useful if you want to provide
more information about a model element.