You can choose to process separate a particular color, or to assign it to a spot plate.

1. Choose Preferences/Printing from the Document menu.
   Make sure Color Separation is checked.

2. Click on Color Specs. The Color Specifications dialog box lists all colors which appear in text or in graphic objects created in RSG.

3. For each color to be separated as a spot color, click the color in the list and then click the Spot button.

4. For each color to be separated as a process color, click the color in the list and click the Process button. All colors default to be process separated.

To print an object on every separation, choose either Pen Color from the Draw menu or Color from the Format menu and select Other. Click the standard color you want to print on all separation, click Custom Name, and type Register as its new name. Click OK. Objects with the color Register will print on all separations.
To print an object on a specific process color plate, custom mix a color to be the same as a process color. See To Custom-Mix and Renam Standard Colors. Select the CMYK option, and adjust the percentages of the process colors so that the required process color is 100% and the others are 0%. Rename the color, then change the object to that color. Keep the color labelled as process in the Color Separations dialog box.