Lightning Event Themes have been updated and improved to simplify Theme creation. A new Images section has been added to the Theme Tab. The Banner and Thumbnail Image fields have been relocated from the Events Info Tab to the Images section in the Theme Tab. A new Event Page Logo field has also been added to the Images section to allow a logo image to appear on the left-hand side of the navigation bar in the microsite.
A new feature has also been added to Theme to allow staff users to apply themes from previous events to the current event. This theme inheritance will speed up event creation and simplify the creation of themes for events.
For more information, please read the Theme article in the user guide.