I want to place different seam allowances on a same line. It is to put a zip fly. I need 1,5 cm instead of 1 cm (for the rest of the back seam).
As you can see on the picture, I want a seam allowance 1 cm between A and B, 1,5 cm between B and C with a gap on B. But I have automatically this inclination : 1 cm on A to 1,5 cm on C (I choose 3 cm in the pattern piece to see better). I have : A - before 2 cm, after 1 cm ; B - before 1 cm, after 1,5 cm ; C before 1,5 cm, after 1 cm.
Anyone can help me ?