When you press the Patterns button on the initial display window, the popup panel shown in Figure 5-4 is displayed.
Press the Apply button to register your pattern. Once a pattern is registered, you can use ttsnoop as a debugging tool to observe what messages are being sent by other applications.
Edit Receive Contexts
Press this button to add, change, and delete receive message contexts in patterns. The popup window displayed, shown in Figure 5-5, allows you to edit contexts to be registered with your patterns.