Cross Seam Ease

This option determines the additional ease used when fitting the designs cross-seam to your cross-seam measurement.

Basically, it gives you a bit of room in the crotch region to make sure the seam is not too tight.

note

The Crotch Lower option does something similar, but this option increases the cross-seam curve by giving you more horizontal space, while the Crotch Lower option increases the cross-seam by lowering the crotch, giving you vertical space.