ode>dev</code>
</td>
<td>
<p>
Graphics device to use for figure output (defaults to png)
</p>
</td>
</tr>
<tr class="even" style="vertical-align: top;">
<td>
<code>highlight</code>
</td>
<td>
<p>
Syntax highlight engine and style, either a built-in Pandoc highlighting
theme, a theme provided by <span class="pkg">rmarkdown</span>, or a <a
href="https://prismjs.com/index.html">prismjs</a> theme (see below).
Pass <code>NULL</code> to prevent syntax highlighting.
</p>
<p>
<strong>Pandoc themes.</strong> By defa