Workflow Definition and Triggering Events 
Use
In the workflow editor you can see the activities in a workflow necessary for the workflow control. Before viewing single activities in more detail, take a look at the triggering events in the workflow Process Notification of Absence to get an overview of it.
Procedure

If you executed the first process step and reached the screen Workflow Template: Display, continue with step 8. Choose the Triggering Events tab.
Menu Path |
Tools ® Business Workflow ® Development ® Definition Tools ® Tasks/Task Groups ® Display |
Transaction Code |
PFTC_DIS |
Each time a form Notification of Absence is created the workflow system starts this workflow sample. The workflow task link definition means that you do not have to change the Notification of absence application program to start a different workflow task in reaction to the event.
Now observe the flow of the workflow.
The Workflow Editor starts.

Technical information (Workflow steps, events, operators and containers) is displayed on the left side of the screen
You can see a section of the flow definition in the middle of the Display
area . You can display a particular section in the area by moving the green rectangle to the right of the Navigation Area. The activities and workflow control flow operations are displayed as green symbols. After each activity one or more rhombuses display its results or the scheduled events.By scrolling forward or backwards in the flow description you will get an overview of the activities in the Process notification of absence workflow sample:
The two events on the top show that the workflow can either be started by the triggering event Form created or by hand in the dialog. The first activity Approve notification of absence either has the result Approved or Rejected. If it is approved, a flag is set and the applicant is notified. If the leave has been rejected, the applicant is informed and can decide whether to revise and resubmit the leave form or withdraw and delete it. Depending on this decision, the leave is resubmitted to the manager or the workflow is finished (‘loop: resubmit NoA).