Now we’re going to change the lip color to mimic a light pink lipstick. First, press Q in order to enter the Quick Mask editing mode, and then choose a soft brush, choose black as the color and then zoom in and paint over the lips. You’ll notice that instead of black, it will seem as if you were painting with red; this is because you’re in the mask mode. Make sure you don’t go over the edges. If you make any mistake, just choose white and paint over that part.