Switch to the Broker Application Development
perspective. The Navigator view is populated with all the message flow and message
set projects that you have access to. A message flow is contained in a file
called <message_flow_name>.msgflow.
Right-click the message flow that you want to work with, and click Open. Alternatively you can double-click the message flow in the Navigator
view.
The graphical view of the message flow is displayed in the editor
view. You can now work with this message flow, for example, adding or removing
nodes, changing connections, or modifying properties.