Each separation is labeled with the color name that InDesign assigned it. If an icon of a printer appears next to the color name, InDesign creates a separation for the color. Any spot inks—including those defined and used in imported PDF files or EPS graphics—also appear in the ink list.
To create a separation, make sure that the printer icon is displayed next to the color name in the ink list.
To choose not to create a separation, click the printer icon next to the color’s name. The printer icon disappears.