Cut a piece of foil that is slightly larger than the printed image and place the foil with the color side up directly over the printed image. Lay a piece of test material or cloth over the foil to help keep the foil to lay flat on the printed garment and close the press for 10 seconds.
Open the press gently so you don't move the foil. Help cool the foil with a piece of test material for at least 15 seconds. And peel off the top carrier sheet from the garment carefully.