# PDF Extra
PDF Extra provides extra PDF features for OpTeX (or in limited form for plain
LuaTeX and LuaLaTeX).
As a minimalistic package OpTeX doesn't support "advanced" features of PDF file
format in the base. This third party package aims to provide them. Summary of
supported features:
- insertion of multimedia (audio, video, 3D);
- hyperlinks and other actions,
- trigger events;
- transitions;
- attachments.
The repository of PDF Extra is at https://github.com/vlasakm/pdfextra.
# Documentation
See `pdfextra-doc.pdf` for documentation. It contains user documentation as
well as technical documentation interleaved with source code.
# Installation instructions
Put `pdfextra.opm` where your TeX can find it. Additionaly, for plain/LaTeX you
need `pdfextra.tex`, and on top of that `pdfextra.sty` for LaTeX.
Or just copy paste anything you want.
# Usage
In OpTeX do: `\load [pdfextra]`.
In plain LuaTeX do: `\input pdfextra`.
In LuaLaTeX do: `\usepackage{pdfextra}`.
# License
This package is available under the Zero-Clause BSD license. See `LICENSE` for
more information.
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