Abstract: The disclosure provides for methods and systems, including computer-readable storage media encoded with a computer program, for generating a composite content presentation from a primary presentation and multiple sub-presentations. The sub-presentations and the primary presentation can be presented seamlessly in the composite presentation with a common appearance through at least some common display elements, such as a navigation bar, appearing across each presentation. Some display elements, such as the navigation bar, may be controlled by the author of the composite presentation, while other display elements unique to each sub-presentation may be controlled by the author of the sub-presentation.