User's Manual

About the Overprint and Enhancement Check Boxes
The Image Quality tab includes the following check boxes to control overprinting and
enhancement:
• Overprint: Select the check box to enable overprint.
• Black Overprint: Select the check box to enable black overprint.
• Text and Graphics Enhancement: Select the check box to enable text and graphic
enhancement.
About Halftones and Screens
Halftone Screen refers to the pattern of dots or lines of varying sizes applied to an image
of varying tones, or same sized dots applied to a tint of color for color systems.
The System Specified halftone screen is the default option applied.
Make the desired selection.
Tip
The number values seen in the list of options refer to the screen frequencies of the
various dot screen and line screen patterns described. It is important to note that a
higher-value screen frequency does not necessarily produce a better result. The novice
user is encouraged to accept the default setting, as this setting is designed to produce
the best general results of the available settings.
The general differences among the various kinds of halftone screens are described below:
Note
Selections available vary by printer type.
• Dot Screening: Dot screening applies a rosette type pattern to the screen, which is
a commonly desired screen pattern. The dot screen halftone makes seeing artifacts
and patterns in a large halftone much less likely. However, when two straight line
areas meet one another, slight jags may be visible. A dot screen is particularly useful
for large gradients and other shading areas likely to produce visible lines from a line
screen pattern.
• Line Screen Halftone: A line screen provides a linear dot pattern. The line screen
halftone makes seeing artifacts and patterns in a large halftone more likely compared
to a dot screen. However, when two straight lines adjoining halftone areas meet, the
linear nature of the screen avoids the jagged border areas that are more often found
in a dot screen pattern.
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