You can set the Department values by either quarters or years.
To access the Stack, click on the Portfolio icon [1] and then the Projections icon [2]. From the Projection drop-down select the Projections by Interval [3].
Click the Quarter button [1] and then update the Department values [2] to see how the growth will affect the projection.
Or click the Year button [1] and then update the Department values [2] to see how the growth will affect the projection.