When the "View Orders" window opens it shows a list of any suppliers where purchase orders are still outstanding. In our case we just have one so we won't need to search. If we did have a lot of outstanding orders then we'd be able to use the filters shown in the lower right corner to find the supplier or order we're looking for. You won't need to enter the whole order number or supplier name. Just a few characters and then click the search button to filter out all the records not conforming to the criteria you entered.

In the lower left corner are options allowing you to change this criteria to "All Orders" or "Completed Orders".

To the left of the Supplier's name is a small [+] symbol. Click this symbol to display a list of orders related to the supplier and the window on the following page appears.