Using Burn will reverse the Dodge to a certain extent, but its very difficult to control. I find a more useful, and less destructive method, is to create a blank layer above your image, fill that layer with 50% grey (128,128,128 RGB) and set the blending mode to Overlay.
Now you can Burn and Dodge on that grey layer to your heart's content. To go back to the original, use a paintbrush and paint (again at 50% grey) over what you want reverted.
If you want the dodge/burn to apply to a single layer, make the overlayed grey layer a clipping mask of that layer. |