By default, the grid is ordered by the Auth DateTime column in descending (newest to oldest) order.
You can sort on a different column heading to re-order how the grid is displayed.
Click the heading once to sort in ascending (A to Z / oldest to newest / least to greatest) order.
Click again to sort in descending (Z to A / newest to oldest / greatest to least) order.
The sort column is highlighted in gray.
Also see Specify the Date Range for Payments and Filter the Payment Transactions Grid