Canon G2000 series Online Manual page 522

If the color tone of images is different from the original document, take the
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following measures and scan again.
• On the Advanced Mode tab of ScanGear, set Image Adjustment in Image Settings to None.
Refer to "Image Settings" for your model from Home of the Online Manual for details.
• On the Color Settings tab in the Preferences dialog box of ScanGear, set Color Matching.
Refer to "Color Settings Tab" for your model from Home of the Online Manual for details.
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