Creating a Multiple Transition

To create a multiple transition (a fork or a join):

Identify the states involved. If necessary, place all of the states on the diagram first and arrange as desired.
On the diagram Tool PaletteToolbox choose the fork or join button.
Place either a horizontal or vertical fork or join on the diagram.
Resize as needed.
On the diagram Tool PaletteToolbox, choose the transition button.
Draw links from the source state(s) to the fork/join node, and from the fork/join node to the target state(s).