Create vocabulary in nuxeo platform for dropdown widget. * Add your options in the vocabulary section & choose your vocabulary type according to your business needs * Select your document type * Go to schema section * Add a new field * Select your data type as directory * Select your vocabulary * Save your document type * Configure your layouts like create, edit and meta with new field changes * Hot reload your configuration * Now you can see the new changes in the nuxeo platform. See the complete walk through session from the youtube.