DOC: switch to sphinx_py3doc_enhanced_theme

Author: pavoljuhas

doc/manual/source/conf.py

@@ -117,13 +117,17 @@
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-html_theme = 'default'
+#
+html_theme = 'sphinx_py3doc_enhanced_theme'
 
 # 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
 # documentation.
-#html_theme_options = {}
-html_theme_options = {'collapsiblesidebar' : 'true'}
+#
+html_theme_options = {
+    'collapsiblesidebar' : 'true',
+    'navigation_with_keys' : 'true',
+}
 
 # Add any paths that contain custom themes here, relative to this directory.
 #html_theme_path = []