uPVC Door, how do I move it left and right?

Hi there, I'm having a bit of a problem with my back uPVC door not closing properly unless I grab the handle and pull the door to the side while pulling it shut at the same time, I read you can adjust how far left/right the door is with some hex bolts but I'm unsure which to turn.

Here is a photo of the hinge - http://pho.to/6q0qQ

Thanks.

Try prising the top cap off, to reveal an Allen headed screw. Often they are eccentric which gives you a couple of millimetres of side movement when turned.
Worth a try!
John

open the door stood inside the house and look at the back of the hinge, there will be a nylon off-white bit in the middle, if you push this with a small screwdriver it will pop the front of the hinge open revealing an adjuster on the outside for R+L movement