diff --git a/docs/source/_static/css/custom.css b/docs/source/_static/css/custom.css
index ebf9a0e17d..db3532e97b 100644
--- a/docs/source/_static/css/custom.css
+++ b/docs/source/_static/css/custom.css
@@ -24,6 +24,13 @@ input {
     letter-spacing: 0.3px
 }
 
+p.caption {
+    margin-top: 2em;
+}
+span.caption-text {
+    font-size: larger;
+}
+
 p {
     font-size: 100%; /* Get rid of RTD rule that assumes nobody changes their browser font size */
 }
diff --git a/docs/source/index.rst b/docs/source/index.rst
index bd85109131..05499f86f9 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -30,17 +30,28 @@ We look forward to seeing what you can do with Corda!
 .. _`download the PDF`: _static/corda-developer-site.pdf
 
 .. toctree::
+   :caption: App development
    :maxdepth: 1
 
    quickstart-index.rst
    key-concepts.rst
    building-a-cordapp-index.rst
-   corda-nodes-index.rst
-   corda-networks-index.rst
    tutorials-index.rst
    tools-index.rst
    node-internals-index.rst
    component-library-index.rst
-   release-process-index.rst
    troubleshooting.rst
+
+.. toctree::
+   :caption: Operations
+   :maxdepth: 2
+
+   corda-nodes-index.rst
+   corda-networks-index.rst
+
+.. toctree::
+   :caption: Participate
+   :maxdepth: 2
+
+   release-process-index.rst
    other-index.rst