How do I attach a file to a message?
You can upload supplemental files as part of your Conversations messages.
Click the Pencil and Paper icon to compose a new message.
Browse for Attachment
Click the Attach link . Select the Choose File button (or Browse, depending on your browser)  to open a dialog box in your browser that will allow you to attach a message.
Select Multiple Files
You can upload additional files by clicking Attach  again. If you accidentally select the wrong file, press the Delete icon  to remove it, or click the Choose File button to select a different file. When you are finished, click the Send button .