Go to Events => Settings => Formatting => Events and edit Default event list format. By defaut events Manager use this code :
Default event list format header:
<table class="events-table" >
<thead>
<tr>
<th class="event-time" scope="col">Date/heure</th>
<th class="event-description" scope="col">évènement</th>
</tr>
</thead>
<tbody>
Default event list format:
<tr>
<td>
#_EVENTDATES<br/>
#_EVENTTIMES
</td>
<td>
#_EVENTLINK
{has_location}<br/><i>#_LOCATIONNAME, #_LOCATIONTOWN #_LOCATIONSTATE</i>{/has_location}
</td>
</tr>
Default event list format footer:
</tbody></table>
for example use this code to add an image :
Default event list format header:
<table class="events-table" >
<thead>
<tr>
<th class="custom-css" scope="col">Image</th>
<th class="event-time" scope="col">Date/Time</th>
<th class="event-description" scope="col">Event</th>
</tr>
</thead>
<tbody>
Default event list format:
<tr>
<td>
#_EVENTIMAGE{90,0}
</td>
<td>
#_EVENTDATES<br/>
#_EVENTTIMES
</td>
<td>
#_EVENTLINK
{has_location}<br/><i>#_LOCATIONNAME, #_LOCATIONTOWN #_LOCATIONSTATE</i>{/has_location}
</td>
</tr>