What lane types exist?
Various lane types exist:
- Lanes that are not specified any further, in all model types
- Lanes for roles, only in Enterprise BPMN collaboration diagrams and Enterprise BPMN process diagrams
- Lanes for organizational units, only in Enterprise BPMN collaboration diagrams and Enterprise BPMN process diagrams
- Lanes for positions, only in Enterprise BPMN collaboration diagrams and Enterprise BPMN process diagrams
- Lanes for groups, only in Enterprise BPMN collaboration diagrams and Enterprise BPMN process diagrams
- Lanes for application system types, only in Enterprise BPMN collaboration diagrams and Enterprise BPMN process diagrams

Since lanes are object types it is impossible to change the symbol.