I have been using Elmer's Glue for basting quilts, as I am too old to crawl around on the floor to thread baste as I used to. I buy glue by the gallon and love this method. I also was taught, many years ago, to glue baste applique seam allowances under before stitching. That worked ok-ish, but I didn't like how difficult it was to get the needle through glue-stiffened fabric. I prefer either needle turn or else freezer paper as an applique technique.