To make the pocket, you will be stitching section A and section B
together. Since two thicknesses of fabric are more bulky than a single
thickness, it will be necessary to learn how to pin them together so
they will not slip when you are stitching them.
Place section A over section B with cut edges of lower corners and side
edges matching. The hem should be folded to the inside and chalk
markings to the outside.
Pin the two pieces together with the points of the pins directed to the
side edges of the case.
[Illustration: KEEP FABRIC SMOOTH IN PINNING]