Sewing technique in Rolled narrow hem

Almost all sewing is a complex combination of manual dexterity and the sewing machine capabilities. When sewing a narrow hem on a dress, often times a bridal or prom dress carefully look at the hem. Inspect for the amount of curve in the hem. If the hem is mostly straight, you should be able to sew the hem using your hands properly and combining short bouts of sewing with short bouts of realigning. This technique explained assumes a right hand dominant perspective but if you are left hand dominant, just reverse it. Place the hem under the presser foot after it has been measured for hem, marked for hem, and then cut 1/2" longer than desired length. This extra allows for a double 1/4" hem . As you place the garment under the foot, roll the hem two times about 1/4" each. Then use your left hand in this specific way. Use your index finger to roll under the first 1/4" and your middle finger to assist in the second roll and guide the hem as it enters the foot and needle. Use your right hand to hold the fabric behind the foot in a taught fashion, not pulling but taught. This might be different for people as many use the left hand to handle the fabric behind the pressor foot and the right hand to handle the fabric before the pressor foot. But sewing is dynamic and you change what you do with your hands depending on what you are doing. If the hem has a lot of curve to it, you many need to stop and adjust frequently. Try to keep the short run of hem perpendicular to the foot and once it begins to curve again, stop and readjust still using your fingers to assist in the double roll. If the hem has deep curves, You may need to hem one 1/4" roll once around and then repeat a second time to get the second roll. Either way, try both ways out to get the best of your time and sewing!