The Performance Period selection criteria can be used to narrow down the time frame for which details will be included in the output. You have the option of specifying:
Custom Date Range -- You can specify a specific From and To date by either typing in the dates directly or using the calendar control.
Named Date Range -- You can specify a named date range from the list of available built-in values. This approach may be particularly helpful if you plan to save the criteria.
Note that if you have enabled the Allow Creation of and Show Fiscal Calendar Options (unanet.fiscal_calendar.enabled) property, additional 'fiscal' period options will be available in the drop-down.
Fiscal periods must be established via the Admin >> Setup >> Fiscal Year screen in order to be available for use in reporting. Specific Fiscal Periods appearing in drop-down lists will be a concatenation of Fiscal Year Name w/ Accounting Period.