Step 4) Stitch the two side edges, the top, and 20cm in from each corner along the bottom taking a 2.5cm seam. Trim seam allowances and carefully clip the corners.
Step 5) Remove all the basting stitches, press open seam allowances and turn through the opening in the lower seam. Press the entire curtain, working in sections. If you can, place the ironing board next to a table. The table will take the weight of the curtain as you work and prevent it from creasing too much after being ironed. Press the raw edges under along the bottom of the curtain and neatly slip stitch closed (see illustration).
Step 6) Following manufacturer's instructions, fit eyelets at regular intervals along the top edge of the curtain.
Step 7) Thread the eyelets over the curtain pole to hang the curtain. Lift the inside edge of the curtain around 50cm up from the bottom edge and, using the main photograph as a guide, fold the curtain back to reveal the reverse fabric. When you're happy with the position, push a decorative pin (such as a kilt pin) in place through both layers of the curtain and secure. When you want to reverse the curtain, carefully remove the pin and just re-attach on the other side.
Picture credit: Michael A. Hill