Originally Posted by
Irishrose2
I prefer the square sewn to the corner and the excess cut off. I know it wastes fabric, but it comes out so exact that way. I fold and press my diagonal rather than draw a line. I sew two threads off the fold toward the corner. That allows the fold to use up a little space.
This is how I do it as well. That way I'm not sewing directly on a line but just shy of the fold line. It works well.