diff --git a/index.html b/index.html
index 7273c0b..a728b74 100644
--- a/index.html
+++ b/index.html
@@ -91,8 +91,16 @@
                         <p>
                             All processing happens locally on your
                             device. No data is uploaded or tracked.
-                            You must have the XML backup available on
-                            your device to view it.
+                            <ul>
+                                <li>You must have the XML backup
+                                    available on your device to view
+                                    it.</li>
+                                <li>Long usernames are truncated.
+                                    Click on such a username to see a
+                                    popup with the full username.
+                                    Click in the same spot to hide the
+                                    popup.</li>
+                            </ul>
                         </p>
 
                         <h2>🔥 Mobile Interface</h2>