A new product or feature set must have the appropriate function and structure to support a natural flow of interaction. For that, Contextual Design uses the User Environment Design. The User Environment Design is a floor plan of the new product showing the places in the product, the function in that place, and the links between one place and another. It shows the parts of the product from the user's point of view and helps the team think structurally about the product. In this chapter we describe the User Environment Design, show how it is represented, and lay out the process for building one from the storyboards.