LiveCycle Reader Extensions switches on functionality within the Adobe Reader on a per document basis. When "Reader Extending" a PDF document, the user selects the capabilities they want to enable, then Reader would enable that functionality when opening the document or form. The user can select all or any combination of the following capabilities: commenting, import and export of form data, ability to submit outside of a web browser, enable database and web services capabilities, capture digital signatures, enable data capture in 2D barcodes and embed file attachments.