Use this dialog to select which item you want to match against when defining a condition or a parameter, as follows.
If you are creating a condition, you might have two items and want to display data where values in the first item match values in the second item. In other words, display data where values exist on both item one and item two. For example, if you had a condition statement:
Data.Month = Analysis.Month
you display data where January exists in both items Data.Month and Analysis.Month.
If you are creating a parameter, this dialog displays all items available in the worksheet, not just items that are currently displayed. For example, although you do not display year information on a worksheet, you might want users to be able to specify which year's data they want to analyze.
Use this list to select which item you want to match against. For example, if you are creating a parameter to enable worksheet users to choose which year's data they want to analyze, you might choose Video Analysis Information.Calendar Year.