The dichotomy between lexical categories and functional categories raises a number of questions from the perspective of syntactic projection of lexical information. The author presents the answers by stating that much generative research on syntactic projection takes the view that projection is symmetric (i.e. parallel) across syntactic categories. The chapter discusses the projection of phrasal structure, and deals with some X-bar theoretic issues. The chapter reviews a number of phrase structural properties, including (multi-) dominance, precedence, binary branching, and multiplanar phrase structure. The chapter deals the projection of thematic information within the lexical projection, the regulating roles of the Theta Criterion and the Extended Projection Principle, and, finally, the so-called VP internal Subject. The chapter deals with the nature of functional categories and the concept of extended projection. The chapter discusses the extended nominal projection, the extended adjectival projection, and the extended adpositional projection.