As a Confluence administrator, you can define the space (referred to as the Site Master Space) from which all other Zen spaces inherit their settings for layout, menus, footers, and headers.
We recommend configuring the Site Master Space (and hence using the Zen Foundation theme in all of your spaces) to provide users with a seamless wiki experience. In other words, users should be able to encounter the same look and feel throughout the site. You can always override these settings within a specific space when needed. (See the Customizing Individual Spaces page for additional information.)
We also recommend creating a separate, dedicated space for the Site Master Space. Please read Broken Links and Images on Zen Pages for a complete explanation, and to ensure your layouts, menu, headers, and footers display properly.
The following steps explain how to configure a Site Master Space.