Documentation outline

docs/source/conf.py

@@ -14,7 +14,10 @@
 # serve to show the default.
 
 import sys
+
+# on_rtd is whether we are on readthedocs.org
 import os
+on_rtd = os.environ.get('READTHEDOCS', None) == 'True'
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
@@ -103,7 +106,13 @@ pygments_style = 'sphinx'
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-html_theme = 'default'
+
+if not on_rtd:  # only import and set the theme if we're building docs locally
+    import sphinx_rtd_theme
+    html_theme = 'sphinx_rtd_theme'
+    html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
+
+# otherwise, readthedocs.org uses their theme by default, so no need to specify it
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the