To use the Messaging feature, simply click on the blue bar on the bottom right of the screen. On the left you will find a drop-down menu with options for Recent, Contacts, and Groups. Choosing Recent will bring up the names of any members you have recently chatted with. Contacts will bring up all of your friends, and they will be grouped into those who are online and those who are offline. The members who are online will have a green dot by their names.