Are you struggling to view 3D models in AutoCAD 2018? Don't worry, I've got you covered. Here's a quick guide to help you efficiently view 3D models in AutoCAD 2018.

Step 1: Open your 3D model in AutoCAD 2018. You can do this by clicking on the 'Open' button and selecting your 3D model from the file explorer.

Step 2: Once your 3D model is open, navigate to the 'View' tab in the top menu.

Step 3: In the 'View' tab, you will find various options for viewing your 3D model. One of the most useful tools is the '3DORBIT' command, which allows you to rotate and view your 3D model from different angles.

Step 4: To use the '3DORBIT' command, simply click on the icon or enter '3DORBIT' in the command line and press Enter. You can then click and drag to orbit around your 3D model and view it from different perspectives.

Step 5: If you want to change the visual style of your 3D model, you can use the 'VSCURRENT' command to access the Visual Styles Manager. Here, you can select different visual styles such as wireframe, hidden, shaded, and more.

Step 6: Another useful tool for viewing 3D models is the '3DCLIP' command. This allows you to create a section plane and cut through your 3D model to get a better view of its internal structure.

Step 7: If you want to quickly switch between standard views such as top, bottom, front, back, left, and right, you can use the 'VIEW' command and select the desired view from the list.

Step 8: Finally, don't forget to save your customized view by creating a new 'Viewpoint' with the 'DVIEW' command. This will allow you to easily return to your preferred view later.

By following these simple steps, you can efficiently view 3D models in AutoCAD 2018 and make the most out of your CAD software. Whether you're a beginner or an experienced user, mastering 3D viewing in AutoCAD 2018 will undoubtedly improve your productivity and workflow. Happy modeling!