diff --git a/doc/content/user_guide/features.md b/doc/content/user_guide/features.md
index 1b3eb0c2..69a841a0 100644
--- a/doc/content/user_guide/features.md
+++ b/doc/content/user_guide/features.md
@@ -14,6 +14,10 @@ Blog post layouts:
 - `layouts/partials/posts/tag.html`: Tag page layout
 - `layers/partials/posts/comments.html`: Empty by default; can be overridden to place a comments section
 
+## Add custom HTML header content
+
+- `layouts/partials/head.html`
+
 ## Shortcut list
 
 The depths of the shortcut list on the left of each post can be
diff --git a/layouts/_default/baseof.html b/layouts/_default/baseof.html
index 993b9253..e940c5bc 100644
--- a/layouts/_default/baseof.html
+++ b/layouts/_default/baseof.html
@@ -11,7 +11,7 @@
     <!-- Add MathJax, if needed -->
     {{ partial "mathjax.html" }}
 
-    <!-- Render custom header -->
+    <!-- Render custom user header -->
     {{ partial "head.html" . -}}
 
     <!-- Refer: https://regisphilibert.com/blog/2018/08/hugo-multilingual-part-1-managing-content-translation/ -->
diff --git a/layouts/partials/head.html b/layouts/partials/head.html
index e69de29b..eec4522a 100644
--- a/layouts/partials/head.html
+++ b/layouts/partials/head.html
@@ -0,0 +1 @@
+<!-- Leave this file empty. This is a placeholder for theme users to customize head content. -->