In Citavi it takes two steps to add a contribution to your project. First you add the parent reference. After that you add the contribution. Likewise, if you are determining how contributions in edited books should be formatted in the Citation Style Editor, you will need to use elements found in two different lists of components.
1 Drag the components for the Contribution from the top list to the Bibliography rule set.
2 Drag the components for the parent reference from the bottom list to the Bibliography rule set. The components for the parent reference have an arrow on them.
3 Add the Page rangecomponent. You will find this component in the list of components for the Contribution.