If you're working on 3D models in Maya and need to export them as OBJ files for use in other 3D applications, it's a fairly straightforward process. Here's a step-by-step guide to help you through it.

1. Select your model: Before exporting, make sure you have the 3D model you want to export open in Maya.

2. Edit and clean up: It's a good idea to clean up your model and remove any unnecessary elements before exporting. This will help ensure a smooth export process.

3. Go to File > Export Selection: Once you're ready to export, go to the File menu and select Export Selection. This will open the Export Selection window.

4. Choose OBJ as the file type: In the Export Selection window, you'll need to select OBJ as the file type from the drop-down menu.

5. Set export options: Maya will open the OBJ Export Options window, where you can customize various settings such as grouping options and export scale. Adjust these settings based on your specific needs.

6. Save your file: Once you've configured the export options, choose a location to save your OBJ file and click Export.

And that's it! You've successfully exported your 3D model as an OBJ file from Maya. Now you can use this file in other 3D applications for rendering, animation, or further editing. OBJ is a widely supported file format, making it easy to transfer your models between different software. Keep in mind that OBJ files only support geometry, so any materials, textures, or animations applied to your model in Maya will need to be re-imported and set up separately in the other software. By following these simple steps, you can seamlessly transfer your 3D models across different platforms and continue working on your projects without a hitch.