An Adobe account is required to make use of the service. The latest upgrade comes with support for a new online service that makes it easy for you to store your PDF documents online and access them from anywhere. Form support has also been improved, allowing you to fill, sign, send and save PDF forms as necessary. Reader XI offers more drawing and annotation tools such as sticky notes, stamps, audio recordings, file attachments, and more. New features and improvements in Adobe Reader XI
The new version of Reader loads PDF documents super fast, and comes bundled with several new features and updates that improves productivity and security. Adobe has released its next generation PDF reading tool: Adobe Reader XI (or Adobe Reader 11).