Paul, I do not pin it. I would be afraid it would distort or tear the lace. I just take my hands and kind of pull down or forward a bit, not much and that does the trick. I have also done the same when it's slightly wet I'll put in on my head with glue and pull it to were I want it and the glue holds it stretched but the lace needs to be damp.

How many of us pulled clothes from the dryer when still damp and stretch them a bit? When they dry it stays stretched.