diff --git a/sphinx_doc_src/_static/custom.css b/sphinx_doc_src/_static/custom.css
new file mode 100644
index 000000000..29eb6b40b
--- /dev/null
+++ b/sphinx_doc_src/_static/custom.css
@@ -0,0 +1 @@
+.sphinxsidebar > ul.current > li.current { font-weight: bold }
diff --git a/sphinx_doc_src/conf.py b/sphinx_doc_src/conf.py
index 6423f116b..fe9ad2180 100644
--- a/sphinx_doc_src/conf.py
+++ b/sphinx_doc_src/conf.py
@@ -29,6 +29,7 @@ def setup(app):
         os.path.join(this_dir, "fish_indent_lexer.py"), lexername="FishIndentLexer"
     )
     lexers["fish-docs-samples"] = fish_indent_lexer
+    app.add_css_file("custom.css")
 
 
 # The default language to assume
diff --git a/sphinx_doc_src/index.rst b/sphinx_doc_src/index.rst
index e24ff62e0..69e363a98 100644
--- a/sphinx_doc_src/index.rst
+++ b/sphinx_doc_src/index.rst
@@ -1856,6 +1856,7 @@ Other help pages
 .. toctree::
    :maxdepth: 1
 
+   self
    commands
    design
    tutorial