p>Show license.
</p>
</dd>
<dt>&lsquo;<samp>-h, -?, -help, --help [<var>arg</var>]</samp>&rsquo;</dt>
<dd><p>Show help. An optional parameter may be specified to print help about a specific
item. If no argument is specified, only basic (non advanced) tool
options are shown.
</p>
<p>Possible values of <var>arg</var> are:
</p><dl compact="compact">
<dt>&lsquo;<samp>long</samp>&rsquo;</dt>
<dd><p>Print advanced tool options in addition to the basic tool options.
</p>
</dd>
<dt>&lsquo;<samp>full</samp>&rsquo;</