Adding and Changing Master iViews in Roles 
Use
You can add a (configured) master iView directly to a role and then change it in the role, i.e. overwrite properties. A new object is created when you add a master iViews to a role: an External Service is created from the master iView.
In this case you should change the properties of the External Service (of the new object) and not those of the original master iViews.
Prerequisites
Move a role to the edit area.
Procedure
Adding a master iView to a role
A list of all the available master iViews appears in the window.
The object is added to the role.
Changing a master iView (External Service) in a role

The Edit pushbutton is not always active. It is only active if a role is reloaded into the edit area and no changes were made to the role. The Edit pushbutton becomes inactive when changes are made to the role. The Edit pushbutton becomes active again once you have saved the role.