diff --git a/man/icewm-keys.pod b/man/icewm-keys.pod
index 3fa5c2732..ea254a74a 100644
--- a/man/icewm-keys.pod
+++ b/man/icewm-keys.pod
@@ -36,7 +36,10 @@ following four ways, which are identical:
     key "Ctrl+plus"         xterm
     key "Ctrl++"            xterm
 
-To bind the mouse use C<Pointer_Button1> for button 1, and so on.
+To bind the mouse, use C<Pointer_Button1> for button 1, and so on.
+This only works when the mouse is over the root window.
+See below for examples.
+
 The command C<icesh keys> instructs icewm to reload this file.
 
 =head2 FORMAT