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To export a 3D DWG or DXF file:

1. Select File > Export > 3D Model. The Export Model dialog box is displayed (Microsoft Windows).
2. Enter a file name for the exported file in the 'File name' (Microsoft Windows) or 'Save As' (Mac OS X) field.
3. Select the export type from the 'Export type' (Microsoft Windows) or 'Format' (Mac OS X) drop-down list.
4. (optional) Click on the Options button. The AutoCAD Export Options dialog box is displayed.
5. (optional) Adjust the options in the AutoCAD Export Options dialog box.
6. (optional) Click the OK button.
7. Click the Export button.