Before constructing your shorts, you might want to iron you seams open. It makes it easier to sew later, and it also helps the new seams look cleaner. Take your two panels and line them up, right sides together. I lined up the seams in the middle first, then pinned the sides. Sew. Next, lay your pants on a flat surface, and pull up the top layer with the middle seam (see picture). Smooth out, and you should now have something that actually looks like a pair of shorts! Pin and sew the crotch. Trim all of your seams.