iscrete_manual()</a></code> which can be used to make arbitrary
discrete scales for arbitrary aesthetics. We use it in the next example
to style the point shapes. Second, there are various point aesthetic
scales, such as <code><a href="../reference/scale_point.html">scale_point_color_hue()</a></code>. See the reference
documentation for these scales for more details.</p>
<div class="sourceCode" id="cb25"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="fu"><a href="https://gg