Curves adjustments are one of the key tools in photo editing, and Lightroom offers three ways of making curves adjustments. What’s more, the curves tools look different in Lightroom CC and Lightroom Classic CC. Complicated? Not once it’s explained…
S-shaped curve
This is a classic curve adjustment designed to improve midtone contrast. One control point is used to lower the curve in the shadows and another is used to raise it in the highlights. This steepens the curve, and hence the contrast, in the midtones, and looks like a flattened and forward-tilted letter 'S'.