% arabdoc1.tex %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\section {Activating \ArabTeX}
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With Plain \TeX, load the \ArabTeX\ macros by \verb"\input arabtex.tex".
With \LaTeX, include the option {\tt "arabtex"}
in the document header.
In both cases some additional files will be loaded automatically.
                                                 \index{\input arabtex.tex}
                                                 \index{option!arabtex}

\ArabTeX\ defines several user commands as indicated below.
There is also a large number of (hidden) internal commands
which could lead to storage (hash table\footnote
{A \TeX\ hash table size of 3000 to 3500 is recommended})
overflow in a small \TeX\ implementation.
All internal commands contain an ``at'' sign ({\tt @}) in their names
and thus should not interfere with any user defined commands
(but could possibly with other \TeX\ extensions we do not know about).
                                                 \index{internal commands}
                                                 \index{user defined commands}
                                                 \index{commands!internal}
                                                 \index{commands!user defined}
                                                 \index{.\TeX\ hash size}

With Plain \TeX, the Arabic font by default is only available
at the normal 14 point size which ought to cooperate well
with the {\tt "cm"} fonts at 10 points.
A bold variant is also provided.
For other sizes, the user has to change the \verb"\magnification"
or to define additional font identifiers himself.
To change the default, inspect the file {\tt "arabtex.tex"} and
redefine the \verb"\pnash" and/or \verb"\pnashbf" command accordingly.
With \LaTeX, the usual size changing commands
will also operate on the Arabic font.
                                                 \index{default font}
                                                 \index{font!default}
                                                 \index{\magnification}
                                                 \index{arabtex.tex}
                                                 \index{\pnash}
                                                 \index{\pnashbf}
                                                 \index{size changing}
                                                 \index{commands!size changing}

\endinput
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