diff --git a/public/index.html b/public/index.html
index cd7f4a181..39c68875f 100644
--- a/public/index.html
+++ b/public/index.html
@@ -174,8 +174,12 @@
           <td colspan="2"></td>
         </tr>
         <tr>
-          <td><span class="help-key">Ctrl</span> <span class="help-key">+</span></td><td>Zoom in</td>
-          <td><span class="help-key">Ctrl</span> <span class="help-key">-</span></td><td>Zoom out</td>
+          <td><span class="help-key">Alt</span> <span class="help-key">+</span></td><td>Worksheet Zoom in</td>
+          <td><span class="help-key">Alt</span> <span class="help-key">-</span></td><td>Worksheet Zoom out</td>
+        </tr>
+        <tr>
+          <td><span class="help-key">Ctrl</span> <span class="help-key">+</span></td><td>App Zoom in</td>
+          <td><span class="help-key">Ctrl</span> <span class="help-key">-</span></td><td>App Zoom out</td>
         </tr>
     </table>
   </div>