diff --git a/docs.it4i/anselm-cluster-documentation/shell-and-data-access.md b/docs.it4i/anselm-cluster-documentation/shell-and-data-access.md
index 436af4c7eee82365848ade0736b4fc24bc3118e5..56a02a06aea799aaeaf498c552461aaef113373c 100644
--- a/docs.it4i/anselm-cluster-documentation/shell-and-data-access.md
+++ b/docs.it4i/anselm-cluster-documentation/shell-and-data-access.md
@@ -196,4 +196,9 @@ Once the proxy server is running, establish ssh port forwarding from Anselm to t
 local $ ssh -R 6000:localhost:1080 anselm.it4i.cz
 ```
 
-Now, configure the applications proxy settings to **localhost:6000**. Use port forwarding  to access the [proxy server from compute nodes](#port-forwarding-from-compute-nodes) as well .
+Now, configure the applications proxy settings to **localhost:6000**. Use port forwarding  to access the [proxy server from compute nodes](#port-forwarding-from-compute-nodes) as well.
+
+### Graphical User Interface
+
+-   The [X Window system](../get-started-with-it4innovations/accessing-the-clusters/graphical-user-interface/x-window-system/x-window-and-vnc) is a principal way to get GUI access to the clusters.
+-   The [Virtual Network Computing](../get-started-with-it4innovations/accessing-the-clusters/graphical-user-interface/vnc) is a graphical [desktop sharing](http://en.wikipedia.org/wiki/Desktop_sharing) system that uses the [Remote Frame Buffer protocol](http://en.wikipedia.org/wiki/RFB_protocol) to remotely control another [computer](http://en.wikipedia.org/wiki/Computer).
diff --git a/docs.it4i/salomon/shell-and-data-access.md b/docs.it4i/salomon/shell-and-data-access.md
index 0d1c9dd564b3a589f697afa43e91f9e8a97c0744..b7b457886ac00977f42bbad6e41f4dfd66564768 100644
--- a/docs.it4i/salomon/shell-and-data-access.md
+++ b/docs.it4i/salomon/shell-and-data-access.md
@@ -189,4 +189,9 @@ Once the proxy server is running, establish ssh port forwarding from Salomon to
 local $ ssh -R 6000:localhost:1080 salomon.it4i.cz
 ```
 
-Now, configure the applications proxy settings to **localhost:6000**. Use port forwarding  to access the [proxy server from compute nodes](#port-forwarding-from-compute-nodes) as well .
+Now, configure the applications proxy settings to **localhost:6000**. Use port forwarding  to access the [proxy server from compute nodes](#port-forwarding-from-compute-nodes) as well.
+
+### Graphical User Interface
+
+-   The [X Window system](../get-started-with-it4innovations/accessing-the-clusters/graphical-user-interface/x-window-system/x-window-and-vnc) is a principal way to get GUI access to the clusters.
+-   The [Virtual Network Computing](../get-started-with-it4innovations/accessing-the-clusters/graphical-user-interface/vnc) is a graphical [desktop sharing](http://en.wikipedia.org/wiki/Desktop_sharing) system that uses the [Remote Frame Buffer protocol](http://en.wikipedia.org/wiki/RFB_protocol) to remotely control another [computer](http://en.wikipedia.org/wiki/Computer).