Line up your seams using your sewing pins, just stick them straight into the fabric pointing out of the other side, once your seams are lined up the way you want then with the pins still sticking straight thru, use another pin on either side and put them in the way you usually do, then remove the ones that are sticking straight thru. Be careful when you put your pins in, when you push them in and then push the pointed end back out to the top you can sometimes inadvertentley un-align your seams. Also if you plan ahead so that you have pressed one seam one direction and the other seam in the opposite direction they will "lock" in for you with ease. I hope this helps.