Digital BW, The Print

Russ,

The best way to burn (or dodge) in PS is not with the Burn or Dodge 
tools; they do not give adequate control and if you overdo it you 
have to start over.  Try the following:

Open a new layer above the layer you want to alter.  Go to Layer--New-
- Layer.  Select Mode--Soft Light.  Check the box "Fill with 50%.  
Now when you paint on this layer with black you will be burning; when 
you paint with white you will be dodging.  When you paint, reduce the 
opacity on your brush quite a bit (like down to around 10% and you 
will have much control over the degree of burning/dodging.  If you 
overburn, just switch your brush back to white and go over the same 
area.  The advantage to working this way is that you will not degrade 
the original image layer.

If you want to limit the alterations to a specific area, you should 
first select that area.  If you're selecting by color the best way to 
do this would probably be by using the Color Range function (found 
under the Select menu).