Adobe ACROBAT 3D Manual page 26

If you want to create documents that extend features to
Adobe Reader users
If you want to create a PDF document that gives Adobe Reader users some of the tools
and features that are normally available only in Adobe Acrobat, you need to include
additional usage rights. These additional usage rights can give users the necessary tools to
fill in forms and submit them online or offline, to participate in email reviews, to add
comments, and to sign documents using Adobe Reader. To add these additional usage
rights, you use a server extension. You can add additional usage rights for commenting
using Acrobat Professional or Acrobat 3D. For more information on additional usage
rights and system requirements, see the Adobe website at
server/readerextensions/main.html (English
www.adobe.com/products/
only).