Today we're going to see ho to adjust the pattern in case of a gaping neckline or a shoulder line that tends to ride up and not stay at its place.
Luckily, this alteration is extremely easy, but it's meant as a small adjustment (no more than 2 cm).
First off, determine on your muslin how much fabric you need to eliminate by pinching the shoulder seam.
Now mark the measurement you got on the shoulder line of the front bodice (side of the neckline). Draw a line going from this point to the other corner of the shoulder. Cut the excess.
Do the same thing to the back bodice.
Now lay your front bodice on your back, matching the shoulder lines. On the front piece, mark the seam allowance, 1,5cm down from the edge and re-draw the neckline of the back bodice do that they meet at the seam allowance. You can use a French curve to help you.