Architecting and designing > Business Process Analysis (BPA) > BPMN > Modeling Sequence and Message Flows on business process diagrams > Drawing Message Flows on business process diagrams
  
Drawing Message Flows on business process diagrams
To depict flow to processes in different pools, you draw Message Flows.
When you place a pool on a diagram, you are provided with a truncated lane. The lane is only increased to enclose any contents drawn within it.
1 To draw message flows that connect to “black box” lanes:
Draw two pools on the diagram.
Draw one message flow between them.
Select the message flow and drag it to the right. The lane is increased in horizontal length to accommodate your moving of the message flow line.
2 Message Flows can cross a pool boundary to attach to the appropriate process. To draw Message Flows to “white box” lanes, draw a Message Flow from a process in one pool to a process in a separate pool.
The following image shows an example of a diagram with Message Flows connecting processes in two pools.
This graphic is described in the surrounding text.
See also
Modeling Sequence and Message Flows on business process diagrams