This document discusses the functions and layouts of settlements. It defines different types of settlement layouts such as dispersed, linear, and nuclear settlements. It then explains that settlements can have multiple functions that may change over time. Some examples of settlement functions provided include tourist resorts, ports, manufacturing/industrial towns, mining towns, market towns, route centers, service centers, and administrative centers. The document emphasizes that most large settlements like London are multi-functional, with different areas serving different functions.