There are tons of stretch laces out there, which will be far less scratchy than your standard lace. Just be sure to use one of your stretch stitches, and you should have absolutely wonderful results! Good luck and enjoy!
I will sew it on the reversed way so the short end of the lace will cover the fabric & not lay on my leg so the pretty bottom part of the lace will show better once I put it on the shorts. I hope that this is the right way & someone sees it & tells me it is so I don't mess them up
There is stretchy lace, mostly for lingerie.
If you are using normal lace, you stretch the fabric slightly while stitching on the lace with a stretchy stitch (like a narrow zigzag), that gives a ruffled effect. Try it out on a small remnant.