Screen Shape / Spot Function. Xanté PlateMaker 6

Screen Shape / Spot Function

The Screen Shape feature allows you to select the shape of the dots that make up the screen pattern for printing. Set this feature via the front panel

Spot Function menu (Setup: Graphic: Spot Function), via the platemaker web browser utilities (Halftoning: Spot Function), or through the PPD options.

Shape choices include the standard, Euclidian, Enhanced 145 LPI; 197

LPI; 256 LPI, Line, Round, Ellipse, Square, Diamond, Rhomboid, and Dual options. Also, there are options to turn on and off the Z-dot feature (see the next section for Z-dot details) and the Enhanced Angles feature (covered earlier in this chapter).

Clicking on Round and Ellipse allows you access advanced options for those shapes. Both shapes feature an Inverted option that allows you to choose how a dot is constructed within its grid. A standard dot is constructed from the mid-point of the grid and expands toward the outside edges. For example, if you change a 10% grayscale to a 90% grayscale, the dot expands from the middle of the grid out. If you select invert and again switch from a 10% to

90% grayscale, the dot grows from the outer edges of the grid in toward the middle.

Rotated 45º and Percent Dot Examples

Ellipse offers two additional advanced options: Percent and Rotate 45º.

Percent allows you to defi ne the height of the ellipse relative to its width in

5% increments from 25% to 90%; for example, 50% defi nes an ellipse half as high as it is wide. Rotate allows you to rotate the dot 45º.

PlateMaker 6 User’s Guide 47