="callout-caption-container flex-fill">
Exercise
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<div id="exercise-ggfx-glow" class="callout-body-container callout-body">
<p>A script containing this code is included as the <code>ggfx-glow.R</code> file</p>
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<section id="dither" class="level2 page-columns page-full">
<h2 class="anchored" data-anchor-id="dither">Dither</h2>
<p>The previous example gives you a pretty good sense of the core mechanic of ggfx: the package supplies the <code>with_*()</code> functions that c