Shortening or lengthening a pattern, most likely a bodice, is a really easy way to modify a pattern to better suit your shape. It’s a really easy alteration to make and one that’ll come as second nature once you’ve done it a few times!
In this tutorial, Layla shows you how to shorten & lengthen a bodice with darts in it (although it’ll work perfectly well if you don’t have darts too!), and there’s also a bonus video on what to do if your pattern doesn’t feature a shorten/lengthen line to begin with!
How to shorten or lengthen a pattern