"Integration coubling variable" -> from 3.5 to 4.0 or later

Hi,

In COMSOL 3.5 or earlier, for "Integration coubling variable", one could go to

option -> Integration coubling variable -> subdomain/boundary/ point variable.

Can anyone tell me how can I do it in COMSOL 4.0 or later for say, boundary variable. like, If I want to integrate temperature/temperature gradient along a boundary, how can I do it. I an kind of confused.

Thanks in advance.