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Chad Chelius

Chad Chelius is a trainer, author, consultant, and speaker residing in the Philadelphia area. He’s been using Adobe products for over 25 years and began his career in the design and publishing industry. As an Adobe Certified Instructor, Accessible Document Specialist, and consultant, he teaches and advises on all Adobe print and web products, specializing … Read more

Alexander Grahn

I work as an engineer in the academic field. As a volunteer, I contributed LaTeX packages for multimedia inclusion and other interactive PDF features, such as Layers and JavaScript-driven animations.