|If you find that there is too much fabric underneath the butt, resulting in baggy saggy horizontal folds at the top of the back thigh, you can easily remove some of this by taking a tuck in your back pant pattern piece. You can take out as much as you can then successfully ease onto the front pattern piece at the inseam. I learned this technique from Sandra Betzina, and she said not to take out more than about 3/4".
This is the altered pattern, and here are the steps to get to this result:
First, make a horizontal slash in your pants pattern from the inseam almost all the way through the outseam, below the crotch. You are creating a hinge in your pattern, which you can then overlap.
Next, redraw your pattern, making sure to keep important aspects intact. As you can see, I kept the long back crotch hook when I redrew my pattern, otherwise, I could have given myself a wedgie in the alteration process.
This is fast, simple, and easy, and really does make a difference in the way the back of your pants fit.