Key Topics

These articles provide background information and explanations of some of the key concepts of PDF and HexaPDF.

• PDF Object Representation
  Information about the types of PDF objects and how they are represented in HexaPDF

• Document Structure
  How a PDF document is structured and the most important objects

• Encryption
  How encrypting PDFs works in general and how to use it with HexaPDF

• Interactive Forms
  Information on interactive PDF forms and how to use them with HexaPDF

• Digital Signatures
  Information about digital signatures with respect to PDF

• Document Layout
  Information about HexaPDF's automatic document layout feature