Background: VNC is an application that allows you to control your VPS remotely, with a Graphical User Interface (GUI).
Step 1
Go to Control Panel and click on Services >> your VPS.
Step 2
Click on Settings and select your desired VNC Password.
Step 3
Type in your desired password and click on "Change VNC Password".
Step 4
Restart your VPS.
Step 5
Click on Install and select VNC. Here you can find the authentification details along with the password which you typed in which you might use in a program like VNC Viewer.
Connection Example:
Address VPS IP:VNC Port
Password the one which you selected.