This document discusses content design and user interfaces for multiscreen projects. It outlines a methodical approach involving iterative work in four core areas: the user, content, rules, and interfaces. Content is modeled according to a building block principle, with atomic elements that can be assembled into larger components and objects. This defines the user interface model. The document provides examples of how content structures map to user interfaces across different touchpoints and channels. It also introduces a software tool called SETU 3.0 that allows content modeling according to the building block principle.