This document discusses the visual dimension of urban design. It addresses three key issues: aesthetic preferences, patterns and aesthetic order, and principles of organization and coherence. Aesthetic preferences relate to how the public visually appreciates environments based on attributes like naturalness and order. Patterns and aesthetic order involve experiencing whole environments as visually coherent ensembles. Principles of organization include similarity, proximity, common ground, orientation, and closure to group elements visually. Urban spaces are analyzed based on their types (streets or squares), relationships, and positive and negative volumetric qualities. Streets involve movement while squares are more static. Formal spaces have strong enclosure while informal are more relaxed.