Hi Amy,
Thanks for reaching out! Are you referring to showing the full description (instead of just the excerpt) or all event details, such as the venue, organizer, etc.?
Either way, you can do this by editing the single event template for photo view found at wp-content/plugins/events-calendar-pro/src/views/pro/photo/single-event.php. You’ll want to follow these instructions to copy the template into your child theme, where you can then make your changes. You can add a “details” link here as well.
If you need any help editing the template, please let me know exactly what you would like to change/add in, and I’ll be happy to point you in the right direction!
Thanks,
Jennifer