On the yoke of this dress you have to turn a hem before you sew it down and it needs to be nice and even since you are turning it to the right side.
Here is a little tip I have for pressing hems so they look nice and straight .
Then place the strip on the wrong side of the fabric and press the hem - folding the fabric over the edge of the folder strip.
This gives you a nice crisp turn with a smooth edge to sew down. It's very quick and easy and could be used to turn a hem on almost anything where you want a nice even edge.