Brother HL 3070CW - Manual (Page 71)

Driver and Software
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Advanced tab
Color Mode
You can change the color mode as follows:
• Normal
This is the Default color mode.
• Vivid
The color of all elements are adjusted to become a more vivid color.
• None
Enhance Black Printing
If a black graphic cannot be printed correctly, choose this setting.
Improve Gray Color
You can improve the image quality of shaded areas by ticking the Improve Gray Color check box.