Alterations: How to alter sleeves that are too tight!

This is how to enlarge an armhole to accommodate large upper arms by "scooping out" and getting a slightly larger armhole, as well as letting out seams in the sleeves and adding a gusset if needed.
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I. N. C. International Concepts Plus Size 3/4 Sleeve Blazer, created for Macy’s in Toasted Twine size 2X