To unzip them, just double-click the zip file and extract the contents. You would typically create a PDF if you wanted to ensure document fidelity, to make it more secure, or to create a copy for storage. To zip your CAD files, just select them, right-click, and choose the option to compress or send to a compressed folder. Creating a PDF can involve compressing a file, making it take up less storage space. They can be viewed on almost all devices. PDF files aren’t typically created from scratch, but are usually converted, saved or ‘printed’ from other documents or images before sharing, publishing online or storing. It is maintained by the International Organisation for Standardization (ISO). The PDF format is now a standard open format that isn’t just available under Adobe Acrobat. The format has evolved to allow for editing and interactive elements like electronic signatures or buttons. Issue: This article describes the compatibility between AutoCAD drawing file formats and AutoCAD versions. Autodesk Shape Manager text file format: Autodesk: AXM.axm: FormIt 360 format: Autodesk: C4D.c4d: Cinema 4D scene: Maxon: C4X.c4x: CADDS 4 Double Precision. Which product can I use to convert format X to format Y. It was developed by Adobe so people could share documents regardless of which device, operating system, or software they were using, while preserving the content and formatting. An overview of CAD formats supported in current versions of main Autodesk products, their conversion options, import, export. PDF stands for ‘Portable Document Format’ file.