diff --git a/docs/topics/selectors.rst b/docs/topics/selectors.rst
index 8a5d44aac..68d8120a8 100644
--- a/docs/topics/selectors.rst
+++ b/docs/topics/selectors.rst
@@ -593,6 +593,9 @@ Built-in Selectors reference
 .. module:: scrapy.selector
    :synopsis: Selector class
 
+Selector objects
+----------------
+
 .. class:: Selector(response=None, text=None, type=None)
 
   An instance of :class:`Selector` is a wrapper over response to select
@@ -720,7 +723,7 @@ SelectorList objects
 
 
 Selector examples on HTML response
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+----------------------------------
 
 Here's a couple of :class:`Selector` examples to illustrate several concepts.
 In all cases, we assume there is already a :class:`Selector` instantiated with
@@ -745,7 +748,7 @@ a :class:`~scrapy.http.HtmlResponse` object like this::
           print node.xpath("@class").extract()
 
 Selector examples on XML response
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+---------------------------------
 
 Here's a couple of examples to illustrate several concepts. In both cases we
 assume there is already a :class:`Selector` instantiated with an
@@ -767,7 +770,7 @@ assume there is already a :class:`Selector` instantiated with an
 .. _removing-namespaces:
 
 Removing namespaces
-~~~~~~~~~~~~~~~~~~~
+-------------------
 
 When dealing with scraping projects, it is often quite convenient to get rid of
 namespaces altogether and just work with element names, to write more