To send a new message, follow these steps:
2) The New Message window will appear
3) Type in a name or phone number. A list of contacts may appear while you're typing to assist you in selecting or searching for an existing contact, if applicable.
Note: You may also add multiple contacts and/or phones numbers
4) You can also attach a photo, video, or document with your message by clicking on the paperclip attachment button.
5) If you wish to include a predefined message, click the small paper icon next to the attachment button.
6) When your message is complete, click "Send"
7) Your new message will either start a new conversation at the top of the Conversation List or move an existing conversation back to the top of the list. You will see your new message in that conversation.