diff --git a/DroidFish/res/raw/about.html b/DroidFish/res/raw/about.html
index ca4fd4e..6b1b1d0 100644
--- a/DroidFish/res/raw/about.html
+++ b/DroidFish/res/raw/about.html
@@ -43,6 +43,10 @@
   <li>
     Long press mode/left/right buttons for additional commands.
   </li>
+  <li>
+    When re-playing a game, change game mode to <i>Edit/re-play Game</i> to
+    be able to undo/redo single half moves.
+  </li>
 </ul>
 
 <h3>Opening books</h3>
diff --git a/DroidFish/src/org/petero/droidfish/DroidFish.java b/DroidFish/src/org/petero/droidfish/DroidFish.java
index c8c1c08..f087f62 100644
--- a/DroidFish/src/org/petero/droidfish/DroidFish.java
+++ b/DroidFish/src/org/petero/droidfish/DroidFish.java
@@ -138,9 +138,7 @@ public class DroidFish extends Activity implements GUIInterface {
 
     // FIXME!!! Remember multi-PV analysis setting when program restarted.
     // FIXME!!! Use high-res buttons from Scid on the go.
-
     // FIXME!!! Option to display coordinates in border outside chess board.
-    // FIXME!!! Hard to understand how to undo a single half-move.
 
     // FIXME!!! Better behavior if engine is terminated. How exactly?
     // FIXME!!! Handle PGN intents with more than one game.