From the Graphical Editor window, select the Edit menu, then click
Add Event, or from the toolbar click on the Add Event button .
This will open the DES Event Editor dialog box.
Enter the Name and Alias of the event in the text boxes. Select the Type of the event using the drop-down box.
There are four Types of events that can be added to a DES:
Lastly, indicate whether you want the event to be Controllable or not using the checkbox. Once you have entered all the event information, click OK and the event will be added to the DES. The new event will appear in the Events pane.