I can see the usefulness of being able to hold your mock-up in your hand, but doesn't the WhitePad rotate when you try to draw on it? Would be nice to have a v

I can see the usefulness of being able to hold your mock-up in your hand, but doesn't the WhitePad rotate when you try to draw on it? Would be nice to have a very thin non-slip pad on the back of it. It also would be very nice to be able to draw, but that has nothing to do with your product.