Well, you go to the part below were it says share page, x friends online and two more symbols. If there are friends online, you click on their name(not exactly the name but when you put your mouse there, it will get darker, then click there). When you click there, another little window will appear and you'll have a little box where you can write. There you write and can chat!
I've copied the page I'm on now, and the part that's in a darker blue(were it says drgroz), is where I've put the mouse ;)
