Select the Messages link at the top of the page. Begin to type the name of the person in the ‘To:’ field. The system will begin to show the persons with that name and you can select from the list once you find the person you want to message.
You can select as many people as you want to receive the message by continuing to type a name and selecting the name while in the ‘To:’ field. Then, type your message at the bottom of the page in the field dedicated for the message.
Once you completed typing your message, click ‘Send Message’.