function UseEnableItemSelection() {
    let pvtTable = ActiveSheet.PivotTables(1)
    let pvtField = pvtTable.RowFields(1)
    // Determine setting for property and enable if necessary.
    if(pvtField.EnableItemSelection == false) {
        pvtField.EnableItemSelection = true
        MsgBox("Item selection enabled for fields.")
    }
    else {
        MsgBox("Item selection is already enabled for fields.")
    }
}