By default a summary of all the certificates of the selected type (according to menu selection) will be listed in the order in which they were added.
Sort the order in which the entries are displayed (e.g. by name, date, place) by clicking on any blue column heading. The sorts will toggle between acending and decending (so to reverse the order click again on the heading).
Search/filter for a specific surname using the search box and clicking the search symbol.