diff --git a/doc/source/user_manual/enhancing.rst b/doc/source/user_manual/enhancing.rst
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+Enhancing ctools
+================
+
+Building your own cscripts
+--------------------------
+
+Building your own ctools
+------------------------
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diff --git a/doc/source/user_manual/expert.rst b/doc/source/user_manual/expert.rst
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+Behind the scenes
+=================
+
+CTA data structure
+------------------
+
+Instrument response functions
+-----------------------------
+
+Maximum likelihood fitting
+--------------------------
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diff --git a/doc/source/user_manual/reference.rst b/doc/source/user_manual/reference.rst
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+ctools reference manual
+=======================
+
+ctools
+------
+
+cscripts
+--------
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