--- a/emacs.rst	Mon Apr 10 14:29:04 2017 +0300
+++ b/emacs.rst	Sat Apr 15 09:41:57 2017 +0300
@@ -99,10 +99,9 @@
 How debug func?
 ---------------
 
-Use M-x debug-on-entry and M-x cancel-debug-on-entry to control
-which functions will enter the debugger when called.
-
-When next time that function called automatically loaded debug-mode.
+Use ``M-x debug-on-entry`` and ``M-x cancel-debug-on-entry`` to control which
+functions will enter the debugger when called. Next time that function loaded in
+debug-mode.
 
 You can use ``(debug)`` in your function to automatically enter to debugger.
 
@@ -120,8 +119,11 @@
 How debug long running command?
 -------------------------------
 
-``M-x debug-on-quit RET`` and then just hit ``C-g`` next time it gets ``stuck``
-somewhere.
+Remember Emacs elisp interpreter single threaded. To interrupt long running
+command press ``C-g``. Sometime it should be typed several times.
+
+On ``toggle-debug-on-quit`` or ``M-x debug-on-quit RET`` on ``C-g`` Emacs enter
+to debug mode.
 
 Check if bug in ini file not in Emacs itself.
 ---------------------------------------------