Quote:
Originally Posted by FMP
This is a curiosity I wanted to share in case it could be of any use.
I commonly scribble on pdf files generated with LaTeX. In doing so, I noticed that the scribbles on a page with a hyperlink happen to be merged into pdf with the color of the hyperlink.
For instance, running pdflatex on the file:
%%%%%%%%%%
\documentclass{article}
\usepackage{hyperref}
\begin{document}
\section{Black}
\newpage
\section{Green\protect\cite{Wikipedia}}
\newpage
\section{Red\protect\footnote{Footnote.}}
\newpage
\begin{thebibliography}{0}
\bibitem{Wikipedia}
\href{http://en.wikipedia.org/}{Blue}.
\end{thebibliography}
\end{document}
%%%%%%%%%%
generates four pages, respectively with no hyperlink and a green, red, and light blue hyperlinks. Scribbling on this pdf and merging will result on a pdf with scribbles in black, green, read, and light blue. A pdf file so generated with this effect is attached.
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I noticed that, too - actually, that's what got me started looking at the topic
(see my other post in the devel thread - I'm fiddling with pdf_tools to get multiple colors - I know where to start, but am currently stalled by work :P)...