Is there a possibility to insert a 'Read more' button in a calendar event? Why: some events aren't important for all of our customers. So if they have the possibility to only see the intro of the event and a 'Read more' button where they can read the details, this can save a lot of scrolling if there are more events (or events with a large description) on one day.
I tried the button in TinyMCE but this doesn't work.

Unfortunately Spider Joomla Calendar does not have this functionality. We really appreciate your advice and will consider including such functionality in the future versions.