
Having selected the source state, you can add a rule to it and then change the state transition statement for that rule so that it causes a transition to the destination state. This will automatically add the transition between the states in the 
Event Flow panel.

Alternatively, click the 

 icon on the 
Event Flow panel’s toolbar to activate 
Connect mode. Small pale red squares, or 
connectors, appear around the border of all the states except the 
end state. Point to a connector on the source state and note how the cursor changes. Press the left mouse button, and while still holding it, move to another connector on the destination state. Release the mouse button to create a transition between the two connectors, and thus the two states.
If you select the source state you will notice that a rule has been created in it that embodies the state transition you have just created. You can repeat this to create more transitions.