diff --git a/html-src/howtoplay.html b/html-src/howtoplay.html
index 82e5428b..419f243b 100644
--- a/html-src/howtoplay.html
+++ b/html-src/howtoplay.html
@@ -6,12 +6,14 @@ Left mouse button:
 <ul type="disc">
 <li> Drag cards around
 <li> Click on the Talon to deal new cards
+<li> Click outside the stacks to undo (if use mouse for undo/redo is enabled)
 </ul>
 <p>
 Right mouse button (or double-click the left button):
 <ul type="disc">
 <li> Drop cards to the Foundations
 <li> Quick play (if enabled)
+<li> Right-click outside the stacks to redo (if use mouse for undo/redo is enabled)
 </ul>
 <p>
 Middle mouse button (or Ctrl-click the right button):