Once a PDF has been digitally signed, it is usually impossible to edit without compromising the signature. And it’s precisely the purpose of an electronic signature not to be able to tamper with a si ...
Last October, the PDF Association held a series of webinars about various aspects of the PDF format. Our technical presentations covered PDF/A conversion and validation and the growing low code/no co ...
Hi Everyone! We’re happy to announce our new PDF/A validator, available with the latest release. Why is it important to validate PDF/A files? Long term archiving is a critical requirement for many in ...
Communicating ideas in digital documents can often be made much clearer through the use of layers. Layers have been supported in PDF documents since version 1.5 through optional content groups (OCGs), ...
Previously in our PDF Optimization In-depth Series: 1. Introduction to the Optimization of Existing PDF files: Methods 2. Lossless Methods: Optimization of Document Content 3. Lossless Methods: Compr ...
Previously in the PDf Optimization In-depth Series. 1. Introduction to the Optimization of Existing PDF files: Methods 2. Lossless Methods: Optimization of Document Content 3. Lossless Methods: Compr ...