Shortening to use pockets

I made my first Cappuccino dress in rayon and I love it. Perfect for the climate I live in. It was my very first FBA and proud to say it worked. But…being only just 5ft and a short body, the pockets are very low and I can only just reach them with my fingers. I read that you need to fold over the pattern to shorten it, but I have no idea by how much, which pieces and where you make the fold. Could you guide me please? If this works, I’ll be wearing nothing but this pattern for ever!