<!DOCTYPE para PUBLIC "-//OASIS//DTD DocBook V3.1//EN">
<para>There are several undocumented settings for <varname>debug</varname>,
among them <literal>3.27</literal> to enable a complete trace and
<literal>3.8</literal> to debug the spell checker. For a complete
list of the possible settings,
see <filename class="headerfile">edit/debug.h</filename>.</para>