diff --git a/twander.1 b/twander.1
index 9d066ae..dafc14d 100644
--- a/twander.1
+++ b/twander.1
@@ -1148,6 +1148,21 @@
 will understand the entry either way.
 
 .IP \(bu 4
+If there is no path on the righthand side of a Directory
+Shortcut Statement, this is the same as having no
+definition at all for that key:
+
+.nf
+# This "undefines" shortcut #5
+DIRSC5 =
+.fi
+
+.IP \(bu 4
+A given Directory Shortcut can only be defined once.  An attempt
+to redefine it will cause a warning message to appear, and the
+second instance of the definition to be ignored.
+
+.IP \(bu 4
 All defined Directory Shortcut paths are also automatically
 inserted into the Directory Menu at program startup (or
 Configuration File reload) whether or not you've actually