I was looking for a way to set the title of the links in the sn_prevTpl and sn_nextTpl chunks to be the pagetitle of the previous and next resources, respectively. Didn't see any mention in the docs but I tried this, for example the sn_nextTpl chunk:
<li>
<a href="[[~[[+id]]]]" title="[[+pagetitle]]"><span class="hidden-xs">Next</span> <i class="fa fa-angle-right"></i></a>
</li>
and it works
Note: I'm using inifinite looping option (see Bruno's comment above) so the chunk might look simpler than you expected.
Loving this extra. Thanks again @Bruno17 !