All of the UML diagram elements share common context menu commands. To use the context menu for an element, simply right click on the element in the Diagram view. To view the common context menu commands, see Common Element Context Commands.
You can model collaboration diagrams using either UML 1.4 or UML 2.0 features.
The context menus described in this section are specific to UML 1.4 collaboration diagram elements.
The actor and object elements offer the following additional context menu selections:
Both the actor and object elements offer special context commands named Select Class and Unlink Class. Select Class expands to display a submenu that shows any classes that are "local" to the diagram and an option named, More, for browsing available classes that you wish to associate with the object.
Local Class List (Class1, Class2)
If there are classes that are "local" to the diagram, then they will be displayed in this list. Select the class from the list to associate it with the object.
More
Select More to open a file browsing dialog to choose a class to associate with an object.
Using the command, Unlink Class, allows you to unlink a previously linked class from an object.
Both the actor and object elements also have a special context command named, New, with a submenu for creating a new class or interface:

Class
Selecting New > Class from the context menu of the actor or object displays the New Object's Class dialog allowing you to create a new class:
Interface
Selecting New > Interface from the context menu of the actor or object displays the New Object's Interface dialog allowing you to create a new interface:
Once a class or interface has been associated with an object, the Show Class command is enabled. This command offers special context commands named, In Editor, In Resource Navigator, In Package Explorer, and In Model Navigator.
In Editor
Opens the source file in the Editor window.
In Navigator
Opens the Navigator view, navigates to and highlights the source file in the view.
In Package Explorer
Opens the Package Explorer view, navigates to and highlights the source file in the view.
In UML Navigator
Opens the UML Navigator view, navigates to and highlights the source file in the view.