The ability to enter your own estimates for the next twelve months in the portfolio reports is used to fine-tune the outlook of current holdings in the context of the review of an existing portfolio, and to give a clearer picture of the near-term expectations. Changing the value here does NOT affect the stock study or anywhere else in the program outside the portfolio features.
At the point where you conduct a stock study, you are looking ahead with the benefit of a view of what's happened, but there is a clear break in the continuum where you say "what's past is past, here's what I expect for the future," and the assumptions are rarely exactly the same. We apply conservative judgment, and scale back growth rates, and lower PE ratios for our long-term view, for instance. However, in the near-term, the future may be a lot less murky than the view is when we try to see out five years. The Portfolio Review Report allows us to incorporate a bit of the near-term view to give us a sense of what's perhaps more likely to occur in the short term, without affecting our long-term vision.
In the history of the BI/NAIC-based methodology, the Portfolio features were never meant to "flow back" to your original stock study -- the original stock study was fixed in time at the point at which you prepared it, and you used the portfolio reports and the PMG/SMG to monitor your holding as time marched onward. Toolkit 6 continues with that approach, even as we recognize that many people use the SSG/Stock Study in lieu of (or as adjunct to) the portfolio tools.