n alias for <code>lexer.property['fold.on.zero.sum.lines'] = '1|0'</code>.</p>

    <p><a id="lexer.folding"></a></p>

    <h3><code>lexer.folding</code> (boolean)</h3>

    <p>Whether or not folding is enabled.
      This option is disabled by default.
      This is an alias for <code>lexer.property['fold'] = '1|0'</code>.</p>

    <p><a id="lexer.graph"></a></p>

    <h3><code>lexer.graph</code> (pattern)</h3>

    <p>A pattern that matches any graphical character (&lsquo;!&rsquo; to &lsquo;~&rsquo;).</p>