Hi Mark!
I’m sorry, but this is a pro feature. In there we have a “carousel” option, what you can turn off:
https://doc.smartslider3.com/article/72-simple-type
and that would not allow the loop and would hide the arrows.
But if you know some coding, you could write a javascript code to do that. Here you can see, how you can trigger js codes, while you are on specific slides:
https://doc.smartslider3.com/article/313-trigger-javascript-code-based-on-slide-switching
so you could use the “currentSlideIndex” variable to find out on which slide you are, and hide the arrows, if it’s the first or the last.