Visual studio Source Control tab is missing tabs

enter image description here

from the options tab in tools tab, the source control tab should has also "visual studio team foundation server" for editing the diff/merge tools as this solution for the beyond compare problem: How to configure Visual Studio to use Beyond Compare

Solution

In Source Control > Plug-in Selection, if you change the Current source control plug-in dropdown from Git to Visual Studio Team Foundation Server, it will add the Source Control > Visual Studio Team Foundation Server section so you can configure User Tools.