In the icons or from the Message menu, select New Message . A Composition screen appears on which you enter the address information, subject, etc.
Messenger puts each address on a separate line.
Select the one you want for that address. Type your message in the box provided. After you finish your message, click on the Send icon to send your message. Messenger displays a window in which you can select the file you want to attach. Or, if you want a file that is not in the current directory, work through your folders in the standard Macintosh way.