Navigation arrow to move just 1 photo?

Easiest way I would think would be to just use some css to move the next image arrows to around the thumbnails. Doing that will give off the same effect that you want without having to mess with the plugins code.

Thanks for your response, I like your thinking.

I’m comfortable making CSS changes but I can’t think of what to change and how that would make the arrow only move to next photo?

The arrow link code is this:
<a class="pageLink next" style="display: block;" href="#" title="Next Page"></a>

You aren’t going to be able to do this with css. The gallery just doesn’t work like that.

This gallery plugin has that feature https://dimsemenov.com/plugins/royal-slider/gallery/

Thanks Dean. Would there be a way to tweak photospace to have the arrow move to the next photo?

Yes you could turn on controls and style the next and prev text buttons.