Seam showing on the outside of a garment:
Hold your pieces with the wrong sides facing each other. Looking at the right sides of your piece, *insert your crochet hook from the front to back (photo 1), through both pieces of fabric. Work a single crochet as follows: Yarn over the hook, pull loop through both pieces of fabric (2 loops on hook, photo 2). yarn over the hook and pull through both loops on hook; repeat from * along seam.