Added history and completion commands.
diff --git a/Tools/idle/help.txt b/Tools/idle/help.txt
index 8732e87..f01e8e6 100644
--- a/Tools/idle/help.txt
+++ b/Tools/idle/help.txt
@@ -52,11 +52,22 @@
Control-Home/End go to begin/end of file
Some Emacs bindings may also work, e.g. ^F/^B/^P/^N/^A/^E
+ Word completion:
+
+ Alt-/ expands the word you have typed to match another word in
+ the same buffer. Repeat to get a different expansion.
+
Python Shell window:
^C interrupts executing command
^D sends end-of-file; closes window if typed at >>> prompt
+ Command history:
+
+ Alt-p retrieves previous command matching what you have typed
+ Alt-n retrieves next
+ Hit return while on any previous command retrieves that command
+
Python syntax colors: the coloring is applied in a background thread
Keywords orange