In a real-world situation, you will often find many people working on a single project. This will be a big issue if everyone is required to work on a single AutoCAD file because once a file is opened by someone, if you open it again, the file will be read-only and won't allow modifications. Fortunately, we have a tool in AutoCAD that allows many people to work on separate files of a project, and then these files can be grouped together in the main drawing using the External References tool, which we will discuss in this chapter. We will also discuss the dynamic block tool, which lets us make blocks with dynamic features, and finally, we will learn about cleaning our drawing and fixing drawing-related issues.

These are the topics that we will discuss in this chapter:

• Working with External Referencess (XRefs)
• Understanding dynamic blocks
• Cleaning and fixing drawing issues

Let's get started with an overview of External Referencess, or XRefs.