@David-Harris Forum search is also now available and seems to work well when searching for a thread/post you already know something about to use as a key.
@johntp There's a knob fer' that...
You may want to investigate the "Pagination" section of your user "Settings". Check/select "Paginate topics and posts instead of using infinite scroll". Default is 20 topics per page but you are free to season to taste. Don't forget to "Save Changes".
Info as to Continuous Scrolling & Pagination Settings also discussed in Forum FAQ, Item #9.