To insert state machine diagram elements:
1.Click the specific state machine diagram icon in the State Machine Diagram toolbar.
2.Click in the State Diagram to insert the element. To insert multiple elements of the selected type, hold down the Ctrl key and click in the diagram window.
Most elements occurring in other state machine diagrams can be inserted into an existing state machine.
1.Locate the element you want to insert in the Model Tree tab (you can use the search function text box, or press Ctrl+F to search for any element).
2.Drag the element(s) into the state diagram.