documenting chill_block.person_post_vertical_menu event/delegated block

source/bundles/person.rst

@@ -136,3 +136,17 @@ Example usage :
 
       {{ person_.render(person, true) }}
 
+Layout events and delegated blocks
+***********************************
+
+:code:`chill_block.person_post_vertical_menu` event
+====================================================
+
+This event is available to add content below of the vertical menu (on the right).
+
+The context is : 
+
+- :code:`person` : the current person which is rendered. Instance of :class:`Chill\PersonBundle\Entity\Person`
+
+
+