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 Advanced Imaging  7-9

If you use gamma corrections in combination with XANTÉ’s new
enhanced screening technology, you can further fine tune your
output quality. See “Levels of Gray” earlier in this chapter and the
next section, “Enhanced Screening,” for more details.

Enhanced Screening

XANTÉ’s enhanced screening allows you to select from the normal
(default) or the enhanced screens defined by 145, 197, or 256 levels
of gray using either the printer’s front panel or via software printer
setup. If you use the front panel, the default enhanced screen is setup
under the MISC:SCREEN menus. If you use the software printer
setup, you can select the levels of gray and gamma settings
simultaneously. Gray level and line screen combinations of enhanced
screens are defined as:

Levels                  Line Screens

of Gray

600 dpi

1200 dpi

145

70

140

197

60

120

256

53

106

There are nineteen possible gamma correction and levels of gray
combinations from which you can choose to fine tune your output
quality. Depending on your printing environment, Macintosh or PC,
use one of the following procedures to select the enhanced screens.

In a Macintosh environment, use the following procedure to select
the enhanced screens.

1.

Select Print… from the File menu from within your
application. The print dialog box appears.

Summary of Contents for Accel-a-Writer 812

Page 1: ...of Gray Line Screens Scanner Resolutions Line Art Scanning Halftone Scanning TIFF PICT EPS Formats Gamma Corrections Enhanced Screening Accurate Calibration Technology Page Design Typefaces and Fonts...

Page 2: ...7 2 Advanced Imagingbb ___________________________________ Notes...

Page 3: ...page design with tips for adding finishing touches for a truly professional image Levels of Gray The resolution of a laser printer is measured in dots per inch dpi The resolutions on your Accel a Writ...

Page 4: ...eens Knowing how many levels of gray you would like to achieve is one factor in determining the appropriate line screen to use Depending on the individual image quality some degree of experimentation...

Page 5: ...olution of 2 times that of the line screen used if printing at 100 size For example if a line screen of 95 is used the scanner resolution should be set to 190 dpi 95 x 2 If that resolution cannot be s...

Page 6: ...the formulas in the previous section Halftone Scanning Note Different versions of PageMaker may work differently See the application manual for details QuarkXPress only allows you to change the line s...

Page 7: ...812 offers seven gamma settings 0 through 6 with 0 as the default Settings 0 through 5 progressively lighten the midrange values If you need a negative reverse image which is required by some printin...

Page 8: ...Black White Input Levels Gamma 5 Black White 1 1 0 Output Levels Black White Input Levels Gamma 4 Black White 1 1 0 Output Levels Black White Input Levels Gamma 3 Black White 1 1 0 Output Levels Blac...

Page 9: ...ault enhanced screen is setup under the MISC SCREEN menus If you use the software printer setup you can select the levels of gray and gamma settings simultaneously Gray level and line screen combinati...

Page 10: ...he desired screen 6 Click OK 7 Click OK 8 Close the Control Panel window Accurate Calibration Technology XANT s Accurate Calibration Technology X ACT allows you easily to calibrate the printer s engin...

Page 11: ...ustments can be done using XANT s Command Center In a Macintosh environment use the following procedure to calibrate line lengths and adjust the printer margins 1 Start Command Center by double clicki...

Page 12: ...ter or longer than the measurement above the vertical scroll bar in figure 7 3 adjust the scroll bar until the measurement reads the exact length of your line 7 Click Update Print When the new page pr...

Page 13: ...f the x axis is low move the x scroll bar right until you reach the desired number of units 13 Click Set Print An alignment page with new settings prints 14 Measure where the x and y axes cross If pos...

Page 14: ...tal line If it is shorter or longer than the measurement to the right of the horizontal scroll bar fig 7 5 adjust that bar until the measurement reads the exact line length 8 Measure the vertical line...

Page 15: ...m and 1 over from the left side of the page If the lines cross at the correct place skip to step 16 13 Use the x scroll bar to make x axis changes and the y scroll bar to make y axis changes fig 7 6 F...

Page 16: ...pter deals with some of the language and elements used in desktop publishing page design Typefaces and Fonts Two very important terms to understand are typefaces and fonts These terms often are used i...

Page 17: ...ch typeface category lends itself to particular areas of page design For example the small detailed lines on a serif typeface helps draw a reader s eye across a line of text This makes it well suited...

Page 18: ...ue Palatino Bold Palatino BoldItalic Miscellaneous Palatino Italic Symbol Palatino Roman ZapfDingbats Times Bold Times BoldItalic Times Italic Times Roman ITC ZapfChancery MediumItalic Typeface Forms...

Page 19: ...a cluttered appearance Other Elements of Design Other elements of design besides typeface forms include orientation pitch point size and spacing Orientation The terms portrait and landscape orientatio...

Page 20: ...e number of characters which can fit horizontally within one inch For example your printer has the PCL typeface Courier 10 pitch 12 points Ten characters fit within an inch and the size is 12 points i...

Page 21: ...ender the downward stoke within a character set fig 7 10 6Point 8 Point 10 Point 12 Point 14 Point 18 Point 24 Point 54 Point Ready 72 Point PostScript Ascender x Height Descender Fig 7 10 Point Sizes...

Page 22: ...cters For example the letter l needs less space than a w Except for Courier the rest of your printer s resident PostScript typefaces are proportionally spaced Proportional spacing is more legible bett...

Page 23: ...ext All capitalized text is much harder to read than mixed case text Vary paragraph lengths to help readers keep track of where they are on the page Keep most paragraphs to five lines or less to help...

Page 24: ...7 24 Advanced Imagingbb ___________________________________...

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