Brother MFC 9840CDW - Manual (Page 149)

Printing and Faxing
142
8
• Normal
This is the default color mode.
• Vivid
The color of all elements are adjusted to become a more vivid color.
Improve Grey Colour
You can improve the image quality of shaded areas by ticking the Improve Grey Colour check box.
Enhance Black Printing
If a black graphic cannot be printed correctly, choose this setting.