ZoneMapper: Adjusting the black point
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One of several adjustments you can make to your photo
using the ZoneMapper tool is the black point.
Black point adjustments are sometimes necessary
for scanned positive color film images
since the density of the film is never truly black.
Additionally, there is always the possibility
of having used an incorrectly profiled scanner
that might have led to a black point that is too high.
To adjust the black point of your photo:
-
Click the ZoneMapper tool button in the
tool bar.
(A new ZoneMapper tool will appear at the top of the
tool stack.)
-
Starting from the last zone,
move the mouse upwards along the zones in the ZoneMapper
until you find a zone
that shows significant highlighting in the
ZoneFinder.
-
Click below that zone.
A zone lock will appear
(a thin, blue line with a little 'X' at its right).
-
Drag the zone lock downwards.
As you do so, your photo's black point will decrease.
-
Optionally:
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To delete a zone lock,
click the little 'X' at its right.