Viewing PHAT constraints

Hi,
For the life of me I cannot figure out how to view the PAHT constraints. Looking at this page it appears I should be able to see a green cone showing me where my constraint begins and ends at so I can align it up right.

I, along with the guy sitting next to me, cannot get the green arc to show in UE 4.11.

If you know please tell me.

Thanks
Russ