Change color options for trapping

Microsoft Publisher only creates traps when you print separations. To print separations, you must set up the publication for process- or spot-color printing (Tools menu, Commercial Printing Tools, Color Printing).

Override one- and two-color thresholds

1. On the Tools menu, point to Commercial Printing Tools, point to Trapping, and then click Preferences.
2. Select the Automatic trapping check box, and then click Thresholds.
3. Enter the value you want for each option, and then click OK twice.

Trap white objects as a spot color

1. On the Tools menu, point to Commercial Printing Tools, and then click Color Printing.
2. Click Spot color(s).
3. Do one of the following:
   • If white is the only spot color, select Spot color 1, click More Colors, and then click the white color tile.
   • If you're using more than one spot color, select Spot color 2, click More Colors, and then click the white color tile.
4. Click OK twice.
5. On the Tools menu, point to Commercial Printing Tools, point to Trapping, and then click Preferences.
6. Select the Automatic trapping check box.
7. Under Luminance, select the Trap white as a color check box, and then click OK.

Change the luminance used to calculate traps for spot colors

1. On the Tools menu, point to Commercial Printing Tools, point to Trapping, and then click Preferences.
2. Select the Automatic trapping check box.
3. Under Luminance, enter the value you want for each spot color, and then 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

1. On the Tools menu, point to Commercial Printing Tools, point to Trapping, and then click Preferences.
2. Select the Automatic trapping check box, and then click Thresholds.
3. Select the Use a keepaway trap for rich blacks containing this percent black check box, and then specify 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.

4. Click OK twice.

Change overprinting settings for black text, lines, fills, and imported graphics

1. On the Tools menu, point to Commercial Printing Tools, point to Trapping, and then click Preferences.
2. Under Black overprinting, enter the changes you want, and then click OK.

   The changes you make affect the entire publication.