Dodge and burn brushes apply only to a “Range” — either Highlights, Midtones, or Shadows.
Is there a way to dodge/burn uniformly across the dynamic range?
Answer
You can create a new layer (50% gray is used often) and set the layer to overlay or soft light.
Then you can brush with white where you want to dodge and black where you want to burn.
Like this all the pixels in the areas you brush are treated whether they are light or dark.
Attribution
Source : Link , Question Author : feetwet , Answer Author : Pete D