With Adobe LiveCycle Reader Extensions, you can create a rights-enabled PDF form. With a right-enabled form, Adobe Reader users comment on, fill, save, distribute, submit, and add digital signatures to the form. When you open a rights-enabled PDF form in Adobe Reader, a dialog box appears outlining the extended capabilities of the PDF file.
For more information about Adobe LiveCycle Reader Extensions, see the Adobe website at www.adobe.com/products/server/readerextensions.