Microtek ScanMaker 6100 Pro User Manual page 86

The Channel allows you to choose the color or gray channel in which the
gamma will be affected.
Curve Tools
The Curve Tools let you modify the curve. The tools are the curve pointer,
the curve zoom frame, and the curve pane.
Use the Curve Pointer tool to define points in the curve that will be modified.
When you click on any point in the curve, a black handle appears to mark your
position. To remove the handle, drag it off the graph.
Use the Curve Zoom Frame tool to zoom in and out on a particular point in the
curve. Once the area is zoomed in, you can then use the Curve Pointer tool to
define new points for better precision. This is particularly useful for working with
12-bit images, where more detail can be seen in such images. The zoom level can
be seen in the Zoom field. To zoom out, click Option (for Mac), or click Shift (for
Windows).
Use the Curve Pane tool to scroll through the curve if the curve has been
zoomed in. This curve tool can be used only if the curve has been zoomed in with
the Curve Zoom Frame button (above). Otherwise, the Curve Panel tool will be
dimmed.
Load
The Load button lets you load a previously saved tone curve for use with
another image. Photoshop-saved curves can also be loaded.
Save
The Save button lets you save a tone curve together with its settings so
that the curve can be used in the future if necessary.
Using the Tone Curve tool:
1. Choose the Channel in which the curve will be modified.
2. If your Image Type is RGB, select All/Master to modify the tone curve
in the red, green, and blue color channels of the image
simultaneously; or select the color channels individually (red, green,
blue) to modify that particular color channel.
3. If your Image Type is Grayscale, only the Gray channel is available for
selection.
2. Choose the Method in which the curve will be modified. Select from
Line, Curve, or Gamma.