These options influence HTML as well as HTML Help output, and other builders
that use Sphinx' HTMLWriter class.
-.. XXX document html_context
The "theme" that the HTML output should use. See the :doc:`section about
+.. confval:: html_context
+ A dictionary of values to pass into the template engine's context for all
+ pages. Single values can also be put in this dictionary using the
+ :option:`-A` command-line option of ``sphinx-build``.
If given, this must be the name of an image file that is the logo of the