WELL WHEN tu ARE ON CHAT tu CLICK ON THEIR NAME AND THERE IS A BOX AND tu CLICK IT AND tu CAN TYPE AND tu CAN CLICK ON THE FACEC AND tu CAN CLICK ON THE FACE AND WHEN YOUR DONE escritura CLICK ENTER o if tu ar messaging spmeone tu can see what tu wrote and at the bottom it says REPLY click it an tu go to the parte superior, arriba of the page an write and when your done tu go to the bottom page and tu press SEND and just keep on doing that everytime tu get a message