Use Explore Builder to set a custom Slideshow URL based on specified search strings.
Now you can set custom search string variables for topic, style, and speed.
Here is an example of a URL Slideshow string:
https://yourlibrary.com/slideshow?search=((Smart::space))&style=seafoam&speed=5
Here, the Search term is "Space"
, modified with a Smart Search. The Style is "Seafoam". And lastly, the Speed is set to "5", which is to say, the 'Slide' remains prominent for 5 seconds.