diff --git a/_data/sidebars/merlin6_sidebar.yml b/_data/sidebars/merlin6_sidebar.yml
index ad0150c..fe82f6a 100644
--- a/_data/sidebars/merlin6_sidebar.yml
+++ b/_data/sidebars/merlin6_sidebar.yml
@@ -47,10 +47,12 @@ entries:
     folderitems:
     - title: Jupyterhub service
       url: /merlin6/jupyterhub.html
-    - title: Jupyterlab
-      url: /merlin6/jupyterlab.html
     - title: Jupytext - efficient editing
       url: /merlin6/jupytext.html
+    - title: Jupyter Extensions
+      url: /merlin6/jupyter-extensions.html
+    - title: Jupyterlab
+      url: /merlin6/jupyterlab.html
   - title: 
   - title: Announcements
     folderitems:
diff --git a/pages/merlin6/04 jupyterhub/jupyter-extensions.md b/pages/merlin6/04 jupyterhub/jupyter-extensions.md
new file mode 100644
index 0000000..9d49cd8
--- /dev/null
+++ b/pages/merlin6/04 jupyterhub/jupyter-extensions.md	
@@ -0,0 +1,32 @@
+---
+title: Jupyter Extensions
+#tags:
+#keywords:
+last_updated: 30 September 2019
+#summary: ""
+sidebar: merlin6_sidebar
+permalink: /merlin6/jupyter-extensions.html
+---
+
+## Using nbextensions for adding features to your notebook
+
+There exist a number of useful [contributed but unofficial
+extensions](https://jupyter-contrib-nbextensions.readthedocs.io/en/latest/index.html)
+that add useful features to your notebooks.
+
+From the classic Notebook UI you can access the available extensions in a separate tab as displayed in the screenshot, below. You may have to unselect the *disable configuration for nbextensions without explicit copatibility*. The extensions we tested still worked fine with this jupyterhub version of 1.0.0.
+
+{% include image.html file="jupyter-nbextensions.png" caption="Launch Classic Notebook" max-width=586 %}
+
+## Extensions for working with large notebooks
+
+Especially the following extensions make working with larger notebooks easier
+   * **Table of Contents**: Displays a TOC on the left and you can also configure it
+     to add and update a TOC at the head of the document.
+   * **Collapsible Headings**: allows you to fold all the cells below a heading
+
+It may also be interesting for you to explore the [Jupytext](jupytext.html) server extension.
+
+## Variable Inspector
+
+The `variable inspector` extension provides a constantly updated window in which you can see the value and type of your notebook's variables.
diff --git a/pages/merlin6/04 jupyterhub/jupyterhub.md b/pages/merlin6/04 jupyterhub/jupyterhub.md
index 2ff47e3..1785d28 100644
--- a/pages/merlin6/04 jupyterhub/jupyterhub.md	
+++ b/pages/merlin6/04 jupyterhub/jupyterhub.md	
@@ -76,20 +76,6 @@ conda create -c conda-forge -p /data/user/${USER}/conda-envs/my-test-env python=
 After this, your new kernel will be visible as `my-test-env` inside of your jupyterhub session.
 
 
-## Using nbextensions for adding features to your notebook
-
-There exist a number of useful [contributed but unofficial
-extensions](https://jupyter-contrib-nbextensions.readthedocs.io/en/latest/index.html)
-that add useful features to your notebooks.
-
-From the classic Notebook UI you can access the available extensions in a separate tab as displayed in the screenshot, below. You may have to unselect the *disable configuration for nbextensions without explicit copatibility*. The extensions we tested still worked fine with this jupyterhub version of 1.0.0.
-
-{% include image.html file="jupyter-nbextensions.png" caption="Launch Classic Notebook" max-width=586 %}
-
-Especially the following extensions make working with larger notebooks easier
-   * **Table of Contents**: Displays a TOC on the left and you can also configure it
-     to add and update a TOC at the head of the document.
-   * **Collapsible Headings**: allows you to fold all the cells below a heading
 
 ## Troubleshooting