Originally Posted by Iceblossom

I've done a couple projects. For me I pinch the middle of both pieces and put my first pin in there.

I found my end results came out flatter if my pinned piece had more of a curve in it. I think that's the best I can describe it -- if it was more 3D while sewing, it was more 2D when pressed.

I almost always press open -- this is one time when I most definitely do not!