1. After you have pulled up your e-mail at Yahoo, click on COMPOSE.
2. Type in the address where it is going along with your message then scroll to the bottom of the page and click ATTACHMENTS.
3. Click BROWSE.
4. Find the file or document you want to attach and click on it.
5. Click OPEN.
6. Click ATTACH THIS FILE (it may take a little while for this step to complete itself).
7. Click DONE.
8. Finally, send your message!