n level2">
    <h2 id="value">Value<a class="anchor" aria-label="anchor" href="#value"></a></h2>
    <p>a <code>ggproto</code> object</p>
    </div>
    <div class="section level2">
    <h2 id="see-also">See also<a class="anchor" aria-label="anchor" href="#see-also"></a></h2>
    <div class="dont-index"><p><code><a href="linking.html">linking</a></code>, <code><a href="selection.html">selection</a></code>, <code><a href="zoom.html">zoom</a></code>,
<code><a href="hover.html">hover</a></code>, <code><a href=