diff -r 81083f8841fe Doc/library/idle.rst
--- a/Doc/library/idle.rst	Fri Mar 22 13:49:53 2013 -0700
+++ b/Doc/library/idle.rst	Sat Mar 23 21:57:59 2013 -0400
@@ -231,6 +231,16 @@
    themes may be altered.  Startup Preferences may be set, and additional
    help sources can be specified.
 
+Terminal Mode (toggle)(Shell Window only)
+   Terminal mode is an IDLE extension that makes the shell behave more like a
+   terminal.  When the terminal extension is toggled on the cursor is confined
+   to the input area of the shell, up and down arrow keys cycle the command
+   history.  When the terminal extension is toggled off the cursor can then
+   travel within the area of the shell allowing a user to select a previous
+   line with the enter key.  In this mode when the enter key is used to select
+   a previous line it is copied to the input area of the shell for editing or 
+   execution.    
+
 Code Context (toggle)(Editor Window only)
    Open a pane at the top of the edit window which shows the block context
    of the section of code which is scrolling off the top of the window.
diff -r 81083f8841fe Lib/idlelib/help.txt
--- a/Lib/idlelib/help.txt	Fri Mar 22 13:49:53 2013 -0700
+++ b/Lib/idlelib/help.txt	Sat Mar 23 21:57:59 2013 -0400
@@ -132,11 +132,26 @@
                           sources can be specified.
 
         ---
-        Code Context (toggle) -- Open a pane at the top of the edit window
-                                 which shows the block context of the section
-                                 of code which is scrolling off the top or the
-                                 window. This is not present in the Shell
-                                 window only the Editor window.
+        Terminal Mode (toggle) -- Terminal mode is an IDLE extension that
+                                  makes the shell behave more like a terminal.
+                                  When the terminal extension is toggled on the
+                                  cursor is confined to the input area of the
+                                  shell, up and down arrow keys cycle the
+                                  command history.  When the terminal extension
+                                  is toggled off the cursor can then travel
+                                  within the area of the shell allowing a user
+                                  to select a previous line with the enter key.
+                                  In this mode when the enter key is used to
+                                  select a previous line it is copied to the
+                                  input area of the shell for editing or
+                                  execution. This is not present in the Editor
+                                  window only in the Shell window.
+
+        Code Context (toggle)  -- Open a pane at the top of the edit window
+                                  which shows the block context of the section
+                                  of code which is scrolling off the top or the
+                                  window. This is not present in the Shell
+                                  window only the Editor window.
 
 Windows Menu (Shell and Editor):