This sample exercise is both utility and decorative. After sewing the seam and overlocking/serging the seam closed, press the seam to one side. Flip the garment to the face side and stitch on top of the fabric through the seam allowance. This will hold the seam allowance to the fabric. A single topstitch is usually placed 1/16th to 1/8th from the seam. The second topstitch can be done 1/8, 1/4 or 3/8 from the first line of topstitching, as long as the second topstitch catches the seam allowance underneath. These courses are designed for learners planning to go into the fashion/apparel production environment. Purchase the patterns for Level 1 tutorials here: https://tinyurl.com/AAA-L1-Patterns