OK, I've watched the videos, and am still stumped. (Please note I feel really dumb asking this)
I've knitted a sweater that has gone from sleeve to sleeve, so all I have are underarm and side seams. The videos recommend kitchener stitch, but the demo was using pieces still on the needles. The areas to be sewn are in garter stitch....how do I do the kitchener stitch on a project that is not on the needles?