Hello Tony,
Thanks for writing – glad you liked that showcase piece.
The showcase thread is an example of calendars that people have customized using their great coding skills.
On this support forum we don’t support that level of customization. You would need to code that feature in on your own, or hire a developer to it for you.
We have a useful Themer’s Guide to the Events Calendar that you may want to check out: https://theeventscalendar.com/themers-guide-to-the-events-calendar/
That would be a good starting point to lead you in the right direction, however you will need some knowledge of php, not to mention HTML and CSS, if not other coding languages.
Hope this helps!