Nikon 9235 - Coolscan III Reference Manual page 75

Step 5—Editing Curves Directly
Fine adjustments can be made to brightness and contrast in
specific portions of the tone range by adding additional points
to the curves for each channel. These points can be freely ad-
justed by dragging them into new positions, changing the shape
of the curve. Steepening the slope in a given portion of the
curve will enhance detail in that portion of the tone range.
Changing the curve so that input levels in a given portion of the
tone range are mapped to higher output levels will brighten
tones in the affected tone range; similarly, changing the curve to
map input levels to lower output levels will darken tones in the
affected range.
The Tool Chest can be resized by dragging its borders (Win-
dows) or by dragging the handle at its lower right corner
(Macintosh). The curves edit display changes with the size of
the window, allowing you to enlarge the display to a maximum
of 256 256 pixels. At this size, each of the 256 points on the
curve is represented by a separate pixel, granting maximum pre-
cision when editing curves.
Reference: The Tool Chest
Adding New Points to the Curve
Move the cursor over the curve edit display and click once to
enter curve edit mode. Move the cursor to the position where
you would like to add a new point, then click. A new point will
be added at this position and the curve will automatically be
adjusted to pass through this point. The position of the point
can be adjusted by dragging it to a new location within the curve
edit display. The image in the active window will automatically
be adjusted to reflect changes to the curve.
Removing Points from the Curve
Points can be removed from the curve by dragging them out of
the curve window.
Resetting Curves to Linear
The default linear curve for the current channel can be restored
by clicking the button in the Curves palette. To return all
curves to linear, hold down the Ctrl (Windows) or option
(Macintosh) key on the keyboard while clicking the button.
74