Are you struggling to achieve a bottom view in AutoCAD 3D using the base command? Fear not, as we've got you covered with a simple guide to help you accomplish this task with ease. Follow these steps to get the bottom view you desire in your AutoCAD 3D model. Step 1: Open your AutoCAD 3D model that you want to view from the bottom. Step 2: Ensure that you are in the desired viewing angle and orientation. Step 3: Type 'base' in the command line and press enter. This will activate the base command. Step 4: Select the object or surface that you want to set as the base for the viewing angle. Step 5: After selecting the base, you will be prompted to 'Enter a new value for UCS origin'. Step 6: Here, you can specify the coordinates for the new UCS origin or simply press enter to set it to the current location. Step 7: Finally, to view the model from the bottom, type 'v' for the View option in the command line and press enter. Then select 'Bottom' from the list of available views. This will change the viewing angle to the bottom of the model, allowing you to see it from that perspective. And there you have it - a quick and easy way to achieve a bottom view in AutoCAD 3D using the base command. With these simple steps, you can efficiently navigate and visualize your 3D models in AutoCAD, enhancing your design and drafting process. Mastering these basic commands will significantly improve your workflow and productivity in AutoCAD 3D modeling. So go ahead and give it a try - you'll be amazed at how simple and effective it is to get the bottom view you need for your projects. Happy designing!