To save a Maya file as an OBJ file, follow these simple steps:

1. Open your Maya project and load the model that you want to export as an OBJ file.

2. Once the model is ready, go to File and select Export Selection.

3. In the Export Selection window, choose OBJ as the file type and select the location where you want to save the file.

4. Click Export and the OBJ file will be saved with all the model data and textures included.

By following these steps, you can easily save your Maya file as an OBJ file, making it compatible with various 3D modeling software and platforms. This allows you to share your models with others or use them in different projects without losing any details or textures. Remember to check the export settings to ensure that the OBJ file is saved with the desired parameters and settings. Happy modeling!