Actor Element  
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An actor is a header element that represents an external user or interface that interacts with the system being described.  
Actors are lifelined elements, which means they can send/receive messages and have actions, states, blocks, and timers associated with them.  
Actor elements are added and modified using the Actor Input Form:  
TIP: Pressing the Esc key will clear the contents of the input form and return the focus to the Type combo box. You can then select the type of element you want to add from the dropdown or by typing the first few letters of the desired selection.  
Name for the actor (must be unique in the diagram). The name is used to refer to this actor when adding body elements such as messages and states
Stereotype applied to the actor
The classifier for the actor. Stores the messages, states, actions, and timers associated with the actor and is used for auto-complete
Create a new classifier to associate with the actor (see Creating Classifiers)
Overrides the default display text for the actor (leave blank to use the name)
Display Name
Check to include the actor name in the actor display text
Display Class
Check to include the classifier name in the actor display text
Documentation for the actor (not displayed in the diagram)
Padding Left
Additional padding (in inches) on the left side of the actor
Padding Right
Additional padding (in inches) on the right side of the actor
See Also  
Moving the Insertion Position | Working with the Input Form | Sequence Diagram Elements | Modifying Existing Elements | Diagram View | Sample Diagram | Creating Classifiers | Diagram Tasks  

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