To draw a Message Flow between two elements or Pools, do one of the following

• On the Collaboration diagram pallet, click Message Flow button and connect appropriate shapes.

• Select the Pool header and on the Smart manipulator toolbar, click the Message Flow button.

  A Message Flow must connect two different Pools or inner elements of different Pools.

To create a new Message for a Message Flow, which is typed by a classifier, by using drag and drop operation

• Select the classifier (Class, Input Set, Output Set, or Error) in the Containment tree and drag it to a Message Flow on a Collaboration diagram.

To create a Message for a Message Flow from the Smart Manipulator toolbar

1. On the diagram pane, select a Message Flow path and on the Smart Manipulator toolbar, click the Referenced Messages button. The Select Message dialog opens.
2. Select a Collaboration where you want to create a new message and click the Creation Mode button.
3. Select a Collaboration element and click the Create button.
4. Click OK.

To change a Message display mode

• Right-click a Message Flow and from the shortcut menu select one of the following:
  • Show Message and select a message display mode.
  • Symbol(s) Properties and select the needed Show Message property value.

To change direction of Message Flow

• Right-click the Message Flow and from the shortcut menu, select Refactor > Reverse Direction.

Related elements

• Message
• Message Flow
• Pool and Lane

Related diagram

• BPMN Collaboration Diagram

Related procedures

• Creating a Diagram
• Creating and Using Pool and Lanes
• Creating and Using Conversation Nodes
• Creating and Using Participant