You can use the
Unapply
Pattern menu item to remove the pattern instance and its
binding relationships to the pattern arguments. Pattern authors supply
the methods to perform when the application of a pattern is reversed
so the results of the command will vary.
About this task
By default, elements added to a model as
pattern arguments are not removed by use of the Unapply Pattern menu
item.
If you want to remove individual argument bindings, use
the Unbind Argument menu item.
Procedure
To reverse a pattern application, in the diagram editor,
right-click the pattern instance and click . The pattern instance is deleted from
the model.