Hi there,
Thanks for reaching out! I’d be happy to help with your question.
While there is not a setting for this, it is possible with a bit of customization. You can read more about how to customize event calendar views by visiting this article: https://theeventscalendar.com/knowledgebase/themers-guide/
Basically, you would copy the file from plugins/events-calendar-pro/src/views/pro/photo/single-event.php to [your-theme]/tribe-events/pro/photo/single-event.php. You can make your modifications there, and your custom template will be used instead of the default.
You can use the function
<?php echo tribe_get_event_categories() ?>
to output a linked list of categories within the single event.
Hope that helps! Please let me know if you have any additional questions about this.
Thanks,
Sky