--- a/emacs.rst	Sun Feb 06 22:24:44 2011 +0200
+++ b/emacs.rst	Sun Feb 06 22:28:53 2011 +0200
@@ -22,6 +22,14 @@
 
 * Debugging.
 
+** Evaluating elisp expression on the fly.
+
+Type M-: than lisp expression than type RET.
+
+Or in any buffer place point at the end of lisp expression and type C-x C-e.
+
+Or invoke elisp "shell" by M-x ielm.
+
 ** What functions and variables Emacs load and from which files?
 
 See value of variable 'load-history' (by C-h v load-history RET).