Reorganizing elements within a Process diagram
When editing a process diagram (in graphical mode), the following icons help you reorganize the diagram:
• BPMN Vertical Diagram
enables to arrange vertically the diagram elements
• BPMN horizontal Diagram
enables to arrange horizontally the diagram elements
Diagram reorganization thresholds
Diagram reorganization may take several minutes to proceed for complex diagrams.
• By default, a warning appears if there are more than 50 Sequence Flows in the diagram. The user has to confirm whether he/she wants to proceed with diagram reorganization.

If need be, you can modify this value with the user option
Number of links that requires confirmation for automatic reorganization via the Main Menu > Settings > Options > Diagrams > Display.
• By default, it is not possible to use automatic reorganization if there are more than 100 Sequence Flows in the diagram.

If need be, you can modify this value with the user option
Maximum number of links for automatic reorganization via the Main Menu > Settings > Options > Diagrams > Display.