diff --git a/rtfd/public/web/index.html b/rtfd/public/web/index.html
index 752e1ed..f2850d9 100644
--- a/rtfd/public/web/index.html
+++ b/rtfd/public/web/index.html
@@ -80,6 +80,15 @@
     </section>
 </div>
 
+<ul>
+    <li><strong>strong</strong></li>
+    <li><em>em</em></li>
+    <li><sub>sub</sub></li>
+    <li><sup>sup</sup></li>
+    <li><mark>mark</mark></li>
+    <li><del>del</del></li>
+</ul>
+
 </main>
 
 <!-- footers -->