If you're working with AutoCAD 3D and need to get a bottom view in base command, you've come to the right place. Follow these steps to easily achieve the bottom view in base command:

1. Start by opening your AutoCAD 3D model.

2. Once your model is open, navigate to the 'View' tab on the ribbon at the top of the screen.

3. Within the 'View' tab, you'll find the '3D Views' panel. Click on the 'Viewpoint' drop-down menu within this panel.

4. From the 'Viewpoint' drop-down menu, select 'Bottom' to switch to the bottom view of your 3D model.

5. If the 'Bottom' view is not visible, you can use the 'Base' command to position the model and then select 'Bottom'.

6. With the 'Bottom' view selected, you can now easily work on the base of your 3D model using the base command.

By following these simple steps, you can quickly and easily get a bottom view in base command using AutoCAD 3D. This will allow you to efficiently work on the base of your 3D model and make any necessary adjustments.

AutoCAD 3D is a powerful CAD software that provides a wide range of tools for 3D modeling, and mastering the base command and different viewpoints can greatly enhance your capabilities as a designer or engineer.

Remember to save your work regularly as you make changes. Practice using different viewpoints and the base command to familiarize yourself with the features and increase your proficiency with AutoCAD 3D.

Now that you know how to get a bottom view in base command, you can confidently work on the base of your 3D models and produce high-quality designs with ease.