Gateways: To merge the control flow Same Task To split the control flow just copy paste the 'Same Task' label in different traces Same Task just write a different task label in the next task Optional Task: write a trace not skipping the task write a trace skipping the task Happy Path: Write the Happy Path first as a list of tasks one after the other ... of tasks then write some fragments branching out ... then write some fragments which will diverge after the task mentioned following the dots "..." ... one before the other