The Power of Gray - The Photoshop: Professional Retouching and Compositing Tips, Tricks, and Techniques - page 107

Note
In Figure 2.31 you can see the original dodging and burning, which was a little
too much. Figure 2.32 used the 50% gray brush, and you can see that it has been
reduced. This is only possible when dodging and burning on a new layer, as op-
posed to dodging and burning directly on top of the picture.
Figure 2.31