[pdftex] Read Out Loud function in Acrobat Reader for Dyslexic students

[Martin Heller]

Brad Burkman skrev:
> Can I, using pdftex or pdflatex, add alternate text to tags in the
> reading order so that, while the student sees the result of $-{3\over 8}
> + {3 \over 4}$, it will read aloud as "negative three over eight plus
> three over four," not "thirty-three hyphen forty-eight"?  An Adobe
> tutorial tells me how to change the tags using Acrobat, but I want to do
> it in TeX.  

You can specify the actual text as below. This works for
copy-pasting but I don't know if you can make the read out loud
tool pick it up as well?

\pdfminorversion=5
\documentclass{article}
\begin{document}
\pdfliteral direct {%
  /Span
    <</ActualText (negative three over eight plus three over four)>>
  BDC
}%
$-\frac{3}{8} + \frac{3}{4}$
\pdfliteral direct {%
  EMC
}

Example 10.25 from pdf-reference manual. It does not seem to work
for me. At least the read out loud tool reads the same regardless
of what I put in the expansion string. Why?\\
\pdfliteral direct {%
    /Span << /E ( Doctor ) >> BDC
}%
Dr.
\pdfliteral direct {%
    EMC
}%
Healwell works at 123 Industrial
\pdfliteral direct {%
    /Span << /E ( Drive ) >> BDC
}%
Dr.
\pdfliteral direct {%
    EMC
}%
\end{document}