Digital BW, The Print

Cleavis,

Another nice alternative to the dodge and burn tools,

Make a new layer, fill it with 50% gray im Overlay mode.

Select different levels of gray from the swatches pallet, use the 
airbrush tool at a low percentage and paint into the Gray layer.  
Levels below 50% lighten, levels above 50% darken. Very 
controllable, very adjustable.

You can also use selections and fill themm with different levels 
of gray to affect larger areas.

Butch