Okay it should be visible now. All you have to do now is right click on the picture and a menu should come up click on properties when you click properties go to the part that says address (url) and highlight it using your mouse when you have the address highlighted right click again and then pick copy. After that go to user cp and in the signature section type in (img) then paste the url that you copied then type (/img)

The img things should be in the square brackets however the ones that look like this []