(User Defined Units): Mention how to enter optional display string.

2 files changed, 10 insertions, 1 deletions

diff --git a/doc/misc/ChangeLog b/doc/misc/ChangeLog
index 63d67c66599..29165252fe9 100644
--- a/doc/misc/ChangeLog
+++ b/doc/misc/ChangeLog
@@ -1,3 +1,8 @@
+2008-09-30  Jay Belanger  <jay.p.belanger@gmail.com>
+
+        * calc.texi (User Defined Units): Mention how to enter optional display
+        string.
+
 2008-09-25  Teodor Zlatanov  <tzz@lifelogs.com>
 
         * message.texi (Sending Variables): Fixed variable documentation to
diff --git a/doc/misc/calc.texi b/doc/misc/calc.texi
index be38321f5cf..504fe5ea729 100644
--- a/doc/misc/calc.texi
+++ b/doc/misc/calc.texi
@@ -27877,7 +27877,11 @@ typing @kbd{u d rod} defines the new unit @samp{rod} to be equivalent to
 16.5 feet.  The unit conversion and simplification commands will now
 treat @code{rod} just like any other unit of length.  You will also be
 prompted for an optional English description of the unit, which will
-appear in the Units Table.
+appear in the Units Table.  If you wish the definition of this unit to
+be displayed in a special way in the Units Table buffer (such as with an
+asterisk to indicate an approximate value), then you can call this
+command with an argument, @kbd{C-u u d}; you will then also be prompted
+for a string that will be used to display the definition.
 
 @kindex u u
 @pindex calc-undefine-unit