lling-tooltips.html#fig:tooltip-style">25.11</a> demonstrates how to use it with <code>plot_ly()</code> (basically any chart type you use should support it):</p>
<p></p>
<div class="sourceCode" id="cb221"><pre class="sourceCode r"><code class="sourceCode r"><span id="cb221-1"><a href="controlling-tooltips.html#cb221-1"></a>font &lt;-<span class="st"> </span><span class="kw">list</span>(</span>
<span id="cb221-2"><a href="controlling-tooltips.html#cb221-2"></a>  <span class="dt">family =</span> <span class="