You first select the Enable Color Coding check box in either the Calendar/Timeline Settings page or the Set View Options dialog box. After you check the box, the Based on values for menu displays. This list contains attributes for your projects, programs, or plans (depending on which objects you are currently displaying in the calendar).

If you choose to group objects by this attribute, your calendar contains four colors: one for each valid value plus N/A, corresponding to any objects that do not contain a value for the Product Family attribute.

The calendar also displays a legend in the lower-right corner of the screen. The legend lists all valid values (plus N/A) along with the color corresponding to that value.