How can I have my print product printed on both sides?

The numerical coloring information of a product explains whether the pages are printed in one color (1), four colors (4) or unprinted (0). The digit before the slash indicates the front and/or title page. The digit behind the slash stands for the reverse side and/or inside page.

Examples:

4/0 color: The print product’s front page is printed in four colors (multi-colored). The reverse side is unprinted.

1/1 color: Both the print product’s front and reverse sides are printed in one color.