Can I create a link from one page of the eCatalog to another (for example, on a Table of Contents page)?
To link an image map in an eCatalog, enter the following formula in the URL column on the Map Pages tab:
where n equals the value of the catalog spread that you want to link to.
This system is zero-based, so the Front Cover value is 0, page 2-3 is 1, page 4-5 is 2, and so on. Also, a spread consists of two eCatalog pages. Deselect the Template flag on any image maps that use that syntax, so that the Viewer interprets them correctly.