diff --git a/doc/source/index.md b/doc/source/index.md
index 2698a9424660..313daa4eb143 100644
--- a/doc/source/index.md
+++ b/doc/source/index.md
@@ -9,7 +9,7 @@
:card:
---
-
+
**Getting started**
^^^^^^^^^^^^^^^
@@ -22,7 +22,7 @@ Learn how to install Ray, compute an example with the Ray Core API, and use Ray'
{link-badge}`ray-overview/getting-started.html,"Getting started",cls=badge-light`
---
-
+
**User guides**
^^^^^^^^^^^
@@ -38,7 +38,7 @@ Learn about the key concepts and features. Get in-depth information about Ray's
{link-badge}`ray-core/user-guide.html,"Core",cls=badge-light`
{link-badge}`cluster/running-applications/index.html,"Clusters",cls=badge-light`
---
-
+
**API reference**
^^^^^^^^^^^^^
@@ -51,7 +51,7 @@ The reference assumes familiarity with the key concepts.
{link-badge}`ray-references/api.html,"API reference",cls=badge-light`
---
-
+
**Developer guides**
^^^^^^^^^^^^^^^