Canon MG6400 series Online Manual page 167

Note
Color Matching is available when ScanGear, monitor, color management-compliant
application (such as Adobe Photoshop), and printer are set up correctly.
Refer to the corresponding manual for the monitor, printer, and application settings.
• Monitor Gamma
By setting the gamma value of a monitor, you can adjust the input data to the brightness
characteristics of the monitor. Adjust the value if your monitor's gamma value does not
match the default value set in ScanGear, and the colors of the original image are not
accurately reflected in the monitor.
Click Defaults to return to the default Monitor Gamma value (2.20).
Note
Refer to the manual of your monitor to check its gamma value. If it is not written in the
manual, contact the manufacturer.
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