You can see the relative benefit value contributed by each initiative or Supporting Outcome to Benefits or Objectives using the Contribution of Value tool on the Analysis tab.
Analysis > Contribution of Value toggle on the function.
Then go to the object that you want to focus on. Right-click and select Calculate Contribution score.
This will show the selected object as 100% in a yellow box on the object.
Any other objects that contribute to this one will show their relative contributions to that object.
You can then go to another object and Calculate Contribution Score once more to see the contribution of benefit value to that object.