Tools>Options, Filter Options
This Document can be found in the following categories:

If checked, these options apply filters you set on projects or
resources to the Effort Forecasts sheet and
to demand calculations (as detailed below):
Apply project filter
Resource
demand is calculated for the visible projects only; project
demand and analysis are not affected.
Apply resource filter
Project demand and analysis is calculated from the effort demand
and capacity for visible resources only; resource
demand and analysis are not affected.
Apply effort filter
Project and resource demand and analysis is
calculated from the visible effort (assignment) records only.
Over/Under Utilization Criteria