In sequence diagrams, you can move the sending point
and the receiving point of an asynchronous message between lifelines
to manipulate the time delay between the sending event and the receiving
event. You can have multiple messages that occur between the sending
and receiving lifelines.
To delay the receipt of an asynchronous message:
- Open a sequence diagram that contains at least
two lifelines with messages.
- In the Palette, click Asynchronous Message.
- In the interaction frame, click the source lifeline where
you want to start the message.
- Drag the message first horizontally and then vertically
across existing messages to the target lifeline where you want to
terminate the message.
- Complete one of the following steps:
- If the target lifeline represents a participant
of a structured classifier type, such as a class or a component,
in the Enter Operation Name window, type
a name for the operation and then click OK.
- If the target lifeline represents a participant of a non-structured
classifier type, such as an actor, you can rename the selected message.
The source lifeline is not blocked and interactions can
occur between the points of the send and receive events.