13 Press the seam allowances flat; then press them toward the facing. With the right side up, place the facing (A) under the presser foot, so the needle is aligned to enter the fabric just to the right of the seam at the lower left front; the jacket (B) extends off the left of the machine bed. Keeping the seam allowance turned toward the facing (arrows), stitch all around the fronts and neckline very close to the seam. You will be stitching through the facing and the seam allowance, but not through the jacket. This step, called understitching, helps the facing lie flat.
TIP Along the curve of the neckline, keep the facing lying flat, allowing the jacket to “bunch up” to the left of the curve. Stitch, following the curve of the facing. The clipped seam allowance will “fan out” underneath the facing.