Hemming and narrowing stretch denim capris
What I did:
My client had a pair of moderately stretchy denim capris that she wanted shortened (from capri length to pedal pusher length). She also wanted the legs narrowed a bit.
This was a simple hemming and narrowing job, but with a twist. The fabric — like many jeans these days — was stretch denim. I would just use a straight stitch for hemming and narrowing traditional, non-stretchy jeans, but for stretchy jeans I have started using a zig-zag stitch. When stretchy fabric stretches, straight stitches tend to break, but zig-zag stitches will stretch as the fabric stretches.