You can run the pen program from the Daily Operations window in your Partner windows. Select "Enter/Review Phone Encounters".
You can also type pen at a command prompt. Some users remember the "pen" command because the pen program replaces the pen and paper they previously used to take notes for a call.
When you start pen, you will see the main screen shown below. From here you can jump into each of the pen functions described below.

Function Keys
Press [F1] and enter a patient name to visit the Patient Demographics screen. From there, you can add new phone encounter notes or update existing ones. You can also jump into different programs for the patient you select. Read below for a detailed tutorial.
Press [F2] to generate a list of phone encounters (based on desired criteria) and select those you would like to follow up on. See below for more information.
Press [F3] to generate a list of phone encounters based on various criteria. You can then view the list, send it as an e-mail, or print it. See below for more information.