Add notes to doc section on event loop integration

docs/source/config/eventloops.rst

@@ -7,6 +7,14 b' loop, so you can use both a GUI and an interactive prompt together. IPython'
 supports a number of common GUI toolkits, but from IPython 3.0, it is possible
 to integrate other event loops without modifying IPython itself.
 
+Supported event loops include ``qt4``, ``qt5``, ``gtk2``, ``gtk3``, ``wx``,
+``osx`` and ``tk``. Make sure the event loop you specify matches the GUI
+toolkit used by your own code.
+
+To make IPython GUI event loop integration occur automatically at every
+startup, set the ``c.InteractiveShellApp.gui`` configuration key in your
+IPython profile (see :ref:`setting_config`).
+
 Terminal IPython handles event loops very differently from the IPython kernel,
 so different steps are needed to integrate with each.