In order to correspond with a penpal or another friend, you need to know how to send a message to them. Use the Address screen to keep track of all their different addresses. One pal might have several addresses stored in PenPal Pro.
There are only 2 required bits of information for Address, marked by a red asterisk (*): the pal's name and the kind of Address this is. The Address box then lets you write the address in a natural format, maybe all on one line for an email address, or over several lines for a physical address.
You can also record separately information about the region of this address (like a province or a state name), the country name, and any postal or zip codes.
The Start and End dates let you indicate when an address stops being useful. Maybe it's a temporary address while your pal is away at school, or a temporary job.
When everything is entered, click the "Save" button in the upper left corner.