Visualization update

docs.it4i/salomon/visualization.md

@@ -29,7 +29,7 @@ For remote visualization two nodes with NICE DCV software are available each con
 
 **Install VPN client** [VPN Access](../general/accessing-the-clusters/vpn-access/) (user-computer)
 
-## Windows Users
+### Windows Users
 
 **Install WinSCP client** (user-computer) [Download WinSCP installer](https://winscp.net/download/WinSCP-5.13.3-Setup.exe)
 
@@ -103,7 +103,7 @@ $ qsub -I -q qviz -A OPEN-XX-XX -l select=1:ncpus=4:host=vizserv2,walltime=04:00
 
 **LOGOUT FROM MENU: System->Logout**
 
-## Linux Users
+### Linux Users
 
 **Config SSH tunnels (user-computer)**