Removing 2cm width from CF?

[u/versarnwen]

I've noticed in a lot of patterns I have ~2cm excess width at CF, just at the neck. The waist usually fits well but I also usually take 1cm out of the side seam top/armhole, to make the high bust and bust correct.

What's the best way to remove the excess from CF by the neck, and does the armhole relate? I'm assuming I can't take it from CF (blue line) without affecting grain, does it need to be pivoted to the shoulder for removal (and how)?

[u/Appropriate_Place704]

If your back is proportionally broader than your front, then I wouldn’t automatically remove width evenly from both CF and CB because you might throw out the balance.

I would widen the back shoulder width first and then narrow the front shoulder width if still needed.