You access the event summary by clicking CiviEvent on the CiviCRM home page. There are four items underneath the CiviEvent menu item - Find Participants, Manage Events, New Event and Import Participants (Click on the links for information on those functions).
When you click on CiviEvent, you will be brought to the CiviEvent home page.
Below the overview messages you will see the Event Summary:
This table provides a summary of Events, and includes shortcuts to view the details for these commonly used search criteria.
The table provides a summary of up to ten scheduled and recent Events.
This page also includes a list of recent registrations. You can sort them by clicking on the headers of the column you want to sort by, for example, clicking on the "Fee Level" header will sort registrations by the fee amount received. You can sort them from highest to lowest or lowest to highest by clicking on the column header.