The Combine Historical Periods dialog box appears when you choose the Combine Periods option.

Field Details

From the list box on the left, click the check box beside each period to be included in the combination.

In the list box on the right, click the period that you want to contain the combined data.

Note: If the selected destination period contains data, that data will be completely replaced with the combined data from the periods you selected in the list box on the left.