Squatting the FPS Controller in Unity 5 ?

Hello , I would like to know how to do the crouching FPSController default in Unity 5 ? thank you

 

I wrote this answer when the new standard assets were beta tested in Unity 4. Havn't checked if it still works for the Unity 5 FPC, but should at least provide a starting point : http://answers.unity3d.com/questions/733566/crouching-with-new-beta-assets.html