References in AutoCAD allow designs to be seen as more than just single drawings. In addition to standard line work, AutoCAD drawings can support images and store project data. Designers can also create projects that link drawings together, each one representing a component of the overall design. In AutoCAD 2009: Mastering References, Jeff Bartels goes deeper into the application, using his experience with civil engineering construction drawings to explore the concept of referencing. Using practical examples, Jeff teaches how to maintain project data, automate parts lists, make global changes using external references, incorporate imagery into drawings, and more. Exercise files accompany the course.