Flippy corners - mark or crease?
I am working on a quilt that calls for using flippy corners. I am sewing 2.5" squares to the lower corner of a 4.5" square. I was wondering if most people draw a line corner to corner on the 2.5" square and sew a scant seam near the line line or just use a crease on the diagonal to use as a guide? I have about 80 to do.