AutoCAD offers powerful tools for creating and viewing 3D solid models, allowing users to visualize their designs from different perspectives. To view 3D solid in AutoCAD, follow these steps: 1. Select the 3D solid object in your drawing. 2. Use the ViewCube or Orbit tool to rotate and orient the object to your desired viewpoint. 3. Use the Pan and Zoom tools to navigate and focus on specific areas of the 3D model. 4. Utilize the Visual Styles to change the appearance of the 3D solid, such as wireframe, realistic, or shaded mode. 5. Use the Section Plane tool to cut and view the interior of the 3D solid for better insight into the design. By mastering these techniques, designers and engineers can effectively view and analyze their 3D solid models in AutoCAD, leading to better visualization and comprehension of their designs.