Halo 4 Forge Missing Item

Hello,

After switching from Halo 4 on the 360 to Halo 4 on the Master Chief Collection, I noticed that the ability to make custom trait zones in Halo 4 Forge is no longer there. Yes I can make a trait zone, but the selection in the forge menu to edit it’s traits is no longer there. Is it just located somewhere else or is it just missing all together?

Thanks,
Spartan C66