Viewing STL files in Explorer is a convenient way to visualize 3D models and designs for 3D printing or CAD projects. By simply right-clicking on an STL file and selecting 'Open with' then choosing an appropriate program like Windows 3D Viewer or your preferred CAD software, you can easily view and manipulate STL files directly within Explorer. This allows for quick and easy access to 3D models without the need for additional software or complicated processes. Whether you're a designer, engineer, or hobbyist, being able to view STL files in Explorer streamlines the workflow and improves efficiency when working with 3D models. Additionally, many CAD programs and 3D printing software integrations allow for direct import and manipulation of STL files from within Explorer, making it a valuable tool for anyone working in 3D design and printing. Overall, viewing STL files in Explorer offers a seamless and convenient way to interact with 3D models and designs without the need for specialized software, making it an essential skill for anyone involved in 3D printing or CAD projects.