diff --git a/docs/plugins/overview.md b/docs/plugins/overview.md
index 5d6f170c..1779e2c7 100644
--- a/docs/plugins/overview.md
+++ b/docs/plugins/overview.md
@@ -46,7 +46,7 @@ on_finish | function | `function(){ return; }` | A callback function to execute
 on_start | function | `function(){ return; }` | A callback function to execute when the trial begins, before any loading has occurred. See [this page](../overview/callbacks.md) for more details.
 on_load | function | `function(){ return; }` | A callback function to execute when the trial has loaded, which typically happens after the initial display of the plugin has loaded. See [this page](../overview/callbacks.md) for more details.
 data | object | *undefined* | An object containing additional data to store for the trial. See [this page](../overview/data.md) for more details.
-css_classes | string | null | A list of CSS classes to add to the jsPsych display element for the duration of this trial. This allows you to create custom formatting rules that are only applied to specific trials. See jsPsych/examples/css-classes-parameter.html for examples.
+css_classes | string | null | A list of CSS classes to add to the jsPsych display element for the duration of this trial. This allows you to create custom formatting rules (CSS classes) that are only applied to specific trials. See jsPsych/examples/css-classes-parameter.html for examples.
 
 ## Data collected by plugins
 
diff --git a/examples/css-classes-parameter.html b/examples/css-classes-parameter.html
index bf09ee6b..4843ba35 100644
--- a/examples/css-classes-parameter.html
+++ b/examples/css-classes-parameter.html
@@ -7,6 +7,16 @@
   <script src="../plugins/jspsych-html-keyboard-response.js"></script>
   <link rel="stylesheet" href="../css/jspsych.css">
   <style>
+    /* 
+      Note that these CSS classes will only be added to the jspsych-content div.
+      In order for the CSS rules to be applied to the elements inside this div (stimulus, prompt, etc.),
+      the CSS properties will need to be inherited. Not all CSS properties are inherited from 
+      parent elements, so this will limit what CSS properties you can change using the css_class parameter.
+      To learn more about CSS inheritance, see:
+      https://developer.mozilla.org/en-US/docs/Web/CSS/inheritance
+      https://developer.mozilla.org/en-US/docs/Learn/CSS/Building_blocks/Cascade_and_inheritance#inheritance
+      https://stackoverflow.com/questions/5612302/which-css-properties-are-inherited
+    */
     .condition1 {
       color: red;
       font: small-caps bold 30px/30px Arial, sans-serif;
@@ -17,6 +27,7 @@
       font-size: 40px;
       text-decoration: underline wavy blue;
       line-height: 200%;
+      background-color: aqua;
     }
   </style>
 </head>