How to add or remove a Snap-in in MMC on Windows Server 2012R2?

Windows Server | Windows

Click: "File".

Select: "Add/Remove Snap-in...".

Select the Snap-in you prefere in "Available snap-ins".

Click: "Add".

A Group Policy Wizard pops-up.
(For this example, just click "Finish").

Click: "OK".

In the "Console Root", the new Snap-in is visible.

Windows Server, Windows Server 2012R2, MMC, Console Root