you have to keep on clicking on the photo until it goes large with a box underneath, sorry i did not explain properly before. When you see a pic at first that is part of an album that the person has created so when you click it opens it up with all of the pics in that album. You then click on the photo that you want to comment on and it should go big, scroll down and it says post comment here. if you want to add smilies then click on go advanced.