Level 2, activity Create Account Demand Manager Role


Hello everyone, 


In the, it is mentioned: 

The Account Demand Managers should be able to see the Global Demand Assumptions UX page but not add in growth percentages.


My problem is that I created Global Demand Assumptions UX page in My pages but I am not able to select this ux page as the Landing Dashboard at Users ->Roles. I am wondering how can I link the UX page with the model and then I can have this UX page created showing in the choice of landing dashboard? 


Many thanks in advance.