On the postcard interface, there are various things you can do. You can navigate through your received postcards using the right and left arrow buttons. These postcards are ordered from newest to oldest that you've received. There are also various buttons you can click on to do things:
- Recycle - Deletes only one postcard.
- Remove - Removes all postcards from one sender.
- New Message - You can send a postcard to a friend.