This tip is about marking your buttonholes on your garment....
Normally I just mark a "T" shaped mark for each buttonhole with sewing chalk; the line across the top marking the top where I start the buttonhole and the center line going down being the center of my buttonhole to be. Usually my chalk markings still show on the top, but I never let it bother me too much. They wash out after the first wash.
Yesterday though, I didn't want to get chalk marks on this lovely regency dress I was helping my sister-in-law make, and I had a stoke of genius (at least it felt like one!). To mark the buttonhole placement without marking on the dress, I put down a piece of 1/4 inch quilters tape along the edge of the dress back. All my buttonholes would butt up against the tape to start and thus all be exactly 1/4 inch away from the back edge. I then drew little marks on the tape to space the buttonholes apart evenly and show me where to start sewing them. Afterward, I pulled the tape off, and there were my perfectly spaced buttonholes and no chalk marks!
Blessings,
Jessica