Canon LBP7110Cw Manual page 468

When outlines of light graphics, characters, and lines are not printed smoothly
Select [Mode 4].
When strip-shaped unevenness appears on images (photographic images),
graphics, gradations, and shaded patterns
Select [Mode 5].
When the entire document is not printed smoothly
Select [Mode 6].
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When [Mode 3] is selected, color unevenness may be found in light areas and shaded
patterns.
When [Mode 4] is selected, color unevenness may be found in light areas.
When [Mode 5] is selected, characters, lines, and areas around graphics may not be printed
smoothly.
When [Mode 6] is selected, color unevenness may be appear.