Expand?

I was going to post about this as well but found the answer here: https://wordpress.org/support/topic/su_expand-does-not-work-properly. There are several older threads in the plugin support forum regarding this matter that went unanswered by the plugin author, including this one. You have to adjust the height (Height for collapsed state) which is set to 100 by default. Make it 0 to hide the content completely.

All the other expanding/collapsing shortcodes have a title and content so this is not very intuitive.