In UML diagrams, you can show or hide parameters in operations
according to the level of detail that you want the classifiers in
your diagram to display.
You must have a diagram open in the diagram editor,
and the classifiers operations list compartment must be visible. Ensure
that you have not set preferences to filter or hide operations.
To show or hide a parameter:
- In the diagram editor, right-click the classifier
that contains the operation with parameters; then click Filters.
- Complete one of the following steps:
- To show parameters, click Show Signature to
add the check mark.
- To hide parameters, click Show Signature to
remove the check mark.