more info needed

i feel like i must be missing something with cleanlogic theme.
I would like a list of shortcodes so i can add stuff, these i can’t find anywhere.
what is the accordian?
explain the showcase option?
why can i only have one slider per site, why not one per page.
I’m sure these questions are easy to answer, so i appologise in advance.

https://wordpress.org/plugins/katapult-cleanlogic/