• Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint
Share this Page URL

Chapter 1. Introduction > Introduction to PDF 1.6 Features

1.2. Introduction to PDF 1.6 Features

Several features have been introduced or modified in PDF 1.6. The following is a list of the most significant additions, along with the primary sections where the material is discussed (Section 1.3 below describes PDF 1.5 changes):

  • Encryption enhancements to support using the AES (Advanced Encryption Standard) algorithm and to selectively encrypt embedded files (Section 3.5, “Encryption”).

  • The abilility to specify the size of the unit in default user space, enabling the maximum page size of a PDF document to be increased (“User Space” on page 170).

  • An enhancement to the syntax of DeviceN color spaces to support NChannel color spaces, which give applications greater flexibility when representing colors that are not available on a target device (“DeviceN Color Spaces” on page 238).

  • Greater flexibility in specifying the visibility of graphics based on the state of optional content groups (“Optional Content Membership Dictionaries” on page335), and the ability to lock the states of groups (“Optional Content Configuration Dictionaries” on page345).

  • New facilities for embedding OpenType fonts in PDF files (Section 5.8, “Embedded Font Programs”).

  • Enhancements to markup annotations, including the ability to group them and specify their intent (“Markup Annotations” on page 581, “Free Text Annotations” on page 588, “Line Annotations” on page 590, and “Polygon and Polyline Annotations” on page 595).

  • The ability to specify non-rectangular regions for link annotations (“Link Annotations” on page 587).

  • The ability to specify objects that should be printed at a specific size, regardless of the dimensions of the printed page (“Watermark Annotations” on page 606).

  • Additional support for embedded file attachments, including cross-document linking to and from embedded files (“Embedded Go-To Actions” on page 617).

  • Enhancements and clarifications to digital signatures related to usage rights and MDP (modification detection and prevention) signatures (Section 8.7, “Digital Signatures”).

  • The ability to accurately specify relationships between the dimensions of objects on a page and their real-world counterparts (Section 8.8, “Measurement Properties”).

  • The ability to incorporate models of three-dimensional graphical data, using the U3D format, in a PDF file (Section 9.5, “3D Artwork”).

  • The ability to define user properties that contain non-drawing-related information about objects on a page (“User Properties” on page 804).

  • The addition of Tagged PDF attributes relating to the layout of content in columns (“Column Attributes” on page 861), and the ability to specify content with in a Tagged PDF document whose page content order cannot be accurately determined (“Page Content Order” on page 817).



Not a subscriber?

Start A Free Trial

  • Creative Edge
  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint