choose the account you want to send from. select transfer. Just to the right of contact name there is a green box. Select that green box. That will bring up a window that will have an upper slot for account name, and a lower slot for public key. I recommend using a format like local-name to ensure you don't accidentally send to the wrong account. After you have entered those two boxes hit ok. Select the amount, enter a memo if you feel like it and click send.