recover original rendering format

Author: RDaxini

docs/sphinx/source/user_guide/extras/index.rst

@@ -4,7 +4,7 @@ Extras
 ======
 
 .. toctree::
-   :maxdepth: 1
+   :maxdepth: 2
 
    nomenclature
    faq

docs/sphinx/source/user_guide/getting_started/index.rst

@@ -4,7 +4,7 @@ Getting Started
 ===============
 
 .. toctree::
-   :maxdepth: 1
+   :maxdepth: 2
 
    package_overview
    installation

docs/sphinx/source/user_guide/index.rst

@@ -7,8 +7,28 @@ User Guide
 This user guide is an overview and explains some of the key features of pvlib.
 
 .. toctree::
-   :maxdepth: 2
-   
-   getting_started/index
-   modeling_topics/index
-   extras/index
+   :caption: Getting started
+   :maxdepth: 1
+
+   getting_started/package_overview
+   getting_started/installation
+   getting_started/introtutorial
+
+.. toctree::
+   :maxdepth: 1
+   :caption: Getting started
+
+   modeling_topics/pvsystem
+   modeling_topics/modelchain
+   modeling_topics/timetimezones
+   modeling_topics/bifacial
+   modeling_topics/clearsky
+   modeling_topics/weather_data
+   modeling_topics/singlediode
+
+.. toctree::
+   :maxdepth: 1
+   :caption: Getting started
+
+   extras/nomenclature
+   extras/faq

docs/sphinx/source/user_guide/modeling_topics/index.rst

@@ -4,7 +4,7 @@ Modeling Topics
 ===============
 
 .. toctree::
-   :maxdepth: 1
+   :maxdepth: 2
 
    bifacial
    clearsky