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I am trying to details user stories on a 'User Role and Privileges' screen for an Intranet web application GUI part.

And its a mix and match of Few screens and their within functionality access.
The usual way is having a matrix like structure where we can list down screen names/Interfaces and then in the 2nd step user can choose between the function allowed for that role within the selected screen. 

Is there any GUI idea someone have come across, other than this traditional two step approach (an out of the box, of fancy GUI for Roles screen)? 
 

Thanks