You can use the example below to create a new set of preset Bulk Edit options for your dropdown fields.

Change a user's role with a dropdown or radio field. Replace 41 with the ID of your form, replace 1775 with the ID of the userID field in the form, and replace 1134 with the ID of the role dropdown or radio field.

If you are sending file uploads through an API, you may need more file information than just the url.
[25 show=id encoding=base64] will return the file contents
[25 show=id pathinfo=basename] will return the filename
[25 show=id fileinfo=mimetype] will return the MIME type