In the Design view, drag the Pick element from the Palette to the diagram.
For the On Message branch, configure the properties of the message for which the process is waiting. The configuration is similar to that of the Usage element.
From the Palette, drag the activity that will be executed and place it inside the On Message branch. Configure the activity's properties.
(Optional) Add more On Message branches by choosing Add -> On Message from the pop-up menu and configure them as described above.
(Optional) Add one or more On Alarm branches following the procedure below.