Change template of Drag & Drop module on node add form
You can do this by updating css into that module.

Or once try to use HTML5 Drag &amp; Drop File module. Hope this module provided that you want.


  HTML5 drag &amp; drop + HTML5 file upload with XHR2. Allows the user to
  drag &amp; drop files into a Image/File Field and uploads it immediately
  behind the scenes. In theory it should work for as many files as the
  field allows.