The bias runs at forty five degrees to the warp. It is the direction in which a woven fabric stretches most and drapes softest.
A piece cut on the bias carries a grainline at forty five degrees. In PatternScan Pro the grainline can be set at any angle, so that decision goes into the file instead of being lost on the way.

Digitize sewing patterns without tracing.
Test PatternScan Pro free for 14 days with the full feature set. You need your smartphone, a printer and one pattern you always wanted digital.