images per page setting not doing much

I’m trying this plugin out to see if it will be a suitable replacement for my old gallery plugin which hasn’t been updated in many years.

I have not published a full page yet; I’m working on a draft just until I get it behaving the way I want. Here is my problem:

On the mosaic style page, it is loading only SOME of the thumbnails, with a page selector to go to the next batch.

I have gone into the global settings > gallery views > mosaic and set “Images per page” to 0, but it changes nothing. I stil see “<< | < | 1 of 4 | > | >>”

Would someone point me in the right direction to get the gallery to load the ENTIRE set of thumbnails instead of chunking them into pages?