DWG FastView software is a lightweight CAD viewer that allows users to manage, view, and share AutoCAD drawings. It supports a wide range of file formats, including DWG, DWF, RVT, and PDF. This tool offers various features like precise measurement, layer management, and full-screen viewing, significantly enhancing the user's drawing experience. With version 1.0, users can also edit and annotate their drawings directly through the software.