Used with landscapes missing from 4.14?

So I am learning UE and one of the things I’m trying to do is create a material that I can use on landscapes. From the UE wiki to allow the material to be able to work with landscapes I have to to open the material, then go down to the usage section in details and click the box next to “used with landscapes”. The problem I’m having is that the “used with landscapes” is not there. Am I insane or was this moved / changed in the 4.14 update? Please help.

Thank you.