Controls the curvature of the cross seam curve.
<Note>
This curve has an influence on the amount of fabric at your bum.
People with a flatter bum will get a better fit by increasing this, as the curve will start later,
and this there will be less fabric pooling at the bum.
People with a round bum might want to lower this to create a little more (horizontal) room for their behind.
</Note>
## Effect of this option on the pattern
