/diy/ - Do It Yourself

>>2626073
It depends on how delicate the fabric is. For silks, lightweight stuff like batiste or chiffon, I leave long tails when I cut the thread after sewing, then use a needle to pass one thread to the backside and tie the two threads in a knot by hand. Then trim the tails.
For heavier fabric--cottons, denim, wool, etc.--I sew to the end of the seam, and use the reverse lever to stitch forward 2-3 stitches, then sew regular back over the reverse stitches. That locks them at the end of the seam, and you can trim them even with the fabric surface.
Some machines have a lockstitch, where the needle basically stitches a few times up and down in the same spot, locking the stitches. I personally don't like the way that looks so I don't do that.
You can always hand knot, but not always backstitch.