Adjusting Brightness and ContrastYou can adjust images that are too dark or bright, or too flat due to lack of contrast by using(Brightness/Contrast) in ScanGear (scanner driver)'s Advanced Mode tab.Note• Click (Down arrow) to switch to detailed view. Click (Up arrow) to return to the previous view.• Click Defaults to reset all adjustments in the current window.ChannelEach dot of an image is a mixture of Red, Green, and Blue in various proportions (gradation). Thesecolors can be adjusted individually as a "channel."MasterAdjust the Red, Green, and Blue combined.RedAdjust the Red channel.GreenAdjust the Green channel.BlueAdjust the Blue channel.Note• Only Grayscale will be displayed in Channel when Color Mode is Grayscale.520