If you're working on a 3D design project, you may come across OBJ files, which are a common format for 3D models. To load and display OBJ files in your 3D modeling software, follow these steps:

1. Open your 3D modeling software, such as Blender, Maya, or 3ds Max.

2. Navigate to the 'File' menu and select 'Import' or 'Open'.

3. Choose the OBJ file you want to load from your computer and click 'Open' or 'Import'.

4. The software will then import the OBJ file into your workspace, where you can view and manipulate the 3D model as needed.

5. You may need to adjust the scale, rotation, or position of the OBJ file to fit it into your project.

6. Once you're satisfied with the placement and appearance of the OBJ file, you can continue with your 3D design work, whether it's rendering, animation, or further modeling.

By following these simple steps, you can easily load and display OBJ files in your 3D models, allowing you to incorporate a wide range of 3D assets into your design projects.