Step 7
-
Return to the RGB Channel. If the adjustments
associated with steps 4 to 6 were done correctly you should find that
the RGB Channel histogram is spread out more than the original.
In the example shown below I have managed not to clip Highlight
or Shadows.
-
Adjust the Shadow and Highlight sliders
as required.

The RGB Histogram
The majority if not all colour casts will have been
removed. If they haven't make the necessary adjustments in the normal way
using either Levels, Curves or Colour Balance. For
examples of how this can best be done see
Tutorial 3

Nearly Complete
Step 9

Increase Contrast
Although no master piece the final image is shown below.
Not bad for about 5 minutes work.

The Final Image - Townhouse,
Dublin