Switch to the Broker Application Development perspective. The Broker Development 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 Broker Development
view.
The graphical view of the message flow is displayed in the editor
view. You can now work with this message flow; for example, you can add or
remove nodes, change connections between nodes, or modify node properties.