Adobe Photoshop CC for Photographers
Figure 4.27 In this example I wanted to make the dark tones darker, but without affecting the mid to highlight tones so much. Here is what I did. I placed one curve point on the middle intersection point of the curve and another on the 75% intersection point. I then added a third curve point towards the toe of the curve and dragged downwards to darken the shadows and steepen the curve in the shadow ...