diff --git a/index.html b/index.html
index 169fc6e..9322605 100644
--- a/index.html
+++ b/index.html
@@ -921,7 +921,7 @@
                     <h2>
                         Semantics
                     </h2>
-                    <section class="panel panel-box">
+                    <section class="panel panel-box" id="panel-semantics">
                         <h3>
                             Semantics
                         </h3>
@@ -980,7 +980,7 @@
                         </ul>
                     </section>
                     <div class="chapter-forcewrap"></div>
-                    <section class="panel panel-box">
+                    <section class="panel panel-box" id="panel-keyboard">
                         <h3>
                             Keyboard
                         </h3>
@@ -991,7 +991,7 @@
                             Key presses and releases can be distinguished via special classes: <kbd class="semantic-kbd-press">Press <kbd>A</kbd></kbd> <kbd class="semantic-kbd-release">Release <kbd>A</kbd></kbd>
                         </p>
                     </section>
-                    <section class="panel panel-box">
+                    <section class="panel panel-box" id="panel-preformatted-and-code">
                         <h3>
                             Preformatted and code
                         </h3>
@@ -1013,7 +1013,7 @@
                     <h2>
                         Colors
                     </h2>
-                    <section class="panel panel-box">
+                    <section class="panel panel-box" id="panel-bluelib-color">
                         <h3>
                             Bluelib color
                         </h3>