How Do I Add a New Destination to the Address Book?
On the Destinations screen, you will see a pen icon in the top right corner:

When you click on this, a plus icon will appear in the top left corner of the screen.

Click on this, and the New Destination screen will open.

Enter a recognizable name and the phone number of the new destination here.
Click on Done to save the new destination.
Note: Make sure to enter a valid landline or mobile phone number.