- On the Tools menu, point to Commercial Printing Tools, point to Registration Settings, and then click Publication.
- Select the Automatic trapping check box, and then click Thresholds.
- In the Trapping Thresholds dialog box, enter the threshold value you want for each option, and then click OK twice.
Trap white objects as a spot color
- On the Tools menu, point to Commercial Printing Tools, and then click Color Printing.
- Click Spot colors.
- In the Inks tab, click New Ink.
- In the New Ink dialog box, click the Standard tab, and then click the white swatch in the color palette.
- Click OK twice.
- On the Tools menu, point to Commercial Printing Tools, point to Registration Settings, and then click Publication.
- Select the Automatic trapping check box.
- Under Spot color options, select the Trap white as a color check box, and then click OK.
Publisher gives the white spot color a default luminance value of 100. White objects will trap to other spot-color objects according to the threshold values you have set in the Trapping Thresholds dialog box (Tools menu, Commercial Printing Tools, Registration Settings, Publication, Thresholds).
Change the luminance used to calculate traps for spot colors
- On the Tools menu, point to Commercial Printing Tools, point to Registration Settings, and then click Publication.
- Select the Automatic trapping check box.
- In the list of spot colors under Spot color options, select a spot color, and then type or select a value in the Luminance box. Enter the value you want for each spot color.
- Click OK.
Publisher uses these values to calculate trapping for spot-color objects throughout your publication. A higher luminance value is a lighter color. For example, white has a luminance value of 100, while black has a value of 0.
Change the keepaway trapping setting for rich blacks
- On the Tools menu, point to Commercial Printing Tools, point to Registration Settings, and then click Publication.
- Select the Automatic trapping check box, and then click Thresholds.
- Select the Use a keepaway trap for rich black fills containing this percent black check box, and then type or select the minimum black percentage you want.
Publisher applies a keepaway trap to objects that have this percentage of black ink plus one or more process colors.
- Click OK twice.
Change overprinting settings for black text, lines, fills, and imported graphics
- On the Tools menu, point to Commercial Printing Tools, point to Registration Settings, and then click Publication.
- Under Overprinting Settings, enter the changes you want, and then click OK.
The changes you make affect the entire publication.