A transition in an activity diagram, a control flow
The trigger that makes the transition fire is the occurrence of the event that labels the transition. A control flow is shown as a solid arrow from the source state to the target state and is labeled with a transition string with the following format:
event-name (parameters) [guard condition] / action > send-clause
For example:
right-mouse-down (location) [location in window] / object:=pick-object (location) > object.highlight ()
Name a Control Flow shape and add other property values
Open the element's UML Properties dialog box by double-clicking the icon that represents the element in the tree view or the shape that represents the element in a diagram.
Tip
Control which property values display on a shape in a diagram by right-clicking the shape, and then clicking Shape Display Options. In the UML Shape Display Options dialog box, select and clear options to display or hide property values.
Hide a Control Flow shape's guard condition, events, or actions
Right-click the shape, click Shape Display Options, and then clear Guard, Event, or Action.