Canon DR-6030C - Manual (Page 86)

80 Software Setup
[Prevent Bleed Through / Remove Background] Check Box
Select this to Prevent Bleed Through when scanning thin document pages and
those with dark content on the back side, or to remove the background from
document images.
When this check box is selected, the [Setting] button is enabled to allow
adjustment of the removal level in the [Prevent Bleed Through / Remove
Background Setting] dialog box.
[Reverse Image] Check Box (TWAIN driver only)
Select this check box to reverse (swap) black and white when scanning
documents as black and white (binary) images.
Color Drop-Out
These selections are enabled for scanning modes other than 24-bit Color, so
that you can select a primary color (red, green, blue) or gray to be ignored
(dropped out) or enhanced.
The [Setting] buttons are enabled when [Drop-out color Custom] or [Custom
Color Enhance] is selected, so that you can specify a color range in the [Color
Settings] dialog box for drop-out or enhancement.