diff --git a/data/tips.cfg b/data/tips.cfg
index 192d907945d0..a4683fca4d68 100644
--- a/data/tips.cfg
+++ b/data/tips.cfg
@@ -201,6 +201,7 @@
     source= _ "<i>― Queen Li’sar, 528YW</i>"
 [/tip]
 [tip]
+    # po: Whiteboard is another name for the Planning Mode
     text= _ "You cannot undo a move that uncovers hexes hidden by fog or shroud. Turn on the <b>Delay Shroud Updates</b> option when you need to move units while retaining the ability to undo, or use the new Whiteboard planning tool."
     source= _ "<i>― The Wesnoth Tactical Guide</i>"
 [/tip]