The Theme tab provides the ability to vary the look and feel of a published output based on the deliverable.
Defines alternative external templates to be used when publishing. If no templates are defined in the profile, the template defined in the Book properties is used.
Displays a list of object substitution rules for when the book publishes. The rules identify the objects currently in the book and the objects that they are substituted for during publishing. This allows objects that influence look and feel, like Media objects and Style objects, to be swapped with others.
HTML Associated Files
Defines a list of external files copied to the publishing folder. These override files defined in the book and include things like style sheets, graphics, and so on.