span class="kw">I</span>(<span class="st">&quot;black&quot;</span>), </span>
<span id="cb10-9"><a href="overview.html#cb10-9"></a>  <span class="dt">span =</span> <span class="kw">I</span>(<span class="dv">2</span>)</span>
<span id="cb10-10"><a href="overview.html#cb10-10"></a>)</span></code></pre></div>
<div class="figure" style="text-align: center"><span id="fig:intro-range"></span>
<img src="images/intro-range.svg" alt="Using I() to supply visual properties directly instead of mapping values to a visual 