WP-PageNavi Not Meant for Multi-Page Posts?

This might be, probably is, an embarrassing question but I've been trying to get something a bit more "aesthetic" to show up for multi-page posts than just Page 1 2 3 ...

I installed wp-pagenavi (which I discovered afterward has dire warnings about uninstalling it, as in you can only do that once) ... but it didn't have an affect on my multi-page posts.

I searched the plugin site for info on this and the whole subject of splitting post pages seems to be ignored.

Is this not the purpose of wp-pagenavi? Or at least not one of them?

And supposing I leave wp-pagenavi in ... then I have two different navigation looks.

If not wp-pagenavi, then what? The "Page 1 2 3 ..." is majorily boooring!

Thanks in advance.

P.S. I see the value of wp-pagenavi once you exceed the number of posts on the Home page ... but ... well ... if this one doesn't, isn't there a plugin that presents the same "look and feel" for split posts?