Setting the Dither Pattern
Dithering is a technique for reproducing color and density using groups of small dots. The source data for drawing these dots is called a dither pattern. Using a dither pattern suitable for the image to print enables the gradations and curves of the printed image to be reproduced more smoothly.
1
Press 
(Settings/Register) 
<Adjustment/Maintenance> <Adjust Image Quality> <Dither Pattern Settings>.
(Settings/Register) <Adjustment/Maintenance> <Adjust Image Quality> <Dither Pattern Settings>.2
Select the dither pattern.
<Pattern 1>: The default setting.
<Pattern 2>: This setting enhances reproduction of highlight areas.
3
Press <OK>.
4
Press <Yes>, and perform auto gradation adjustment (full adjustment).
Perform auto gradation adjustment (full adjustment) after changing the settings. Adjusting Gradation