The destinations screen is where your individual Voice, Data and SMS destinations are listed, allowing you to drill down into each destination and set up various options such as setting call fees, connection charges, assigning charge codes etc..
On the main Destinations screen you are able to switch between a Voice, Data and SMS tab at the top of the screen to see destinations specific to those data types.
From this screen you can:
Add destinations - Click the Add Destination button at the top-right of the screen.
Edit a destination - Click the Edit button next to a destination listing.
Delete a destination - Click the Delete button next to a destination listing.