While viewing a multi-page document in S Note, you can long-press on the page number indicator at the bottom of the screen that looks like:
< 8 of 12 >
and up will pop a list of thumbnails showing all the pages in the document, so you can quickly scroll to the page of your choice. One tap and you leap to the desired page.
Wish I would have stumbled on this earlier, before I spent time clicking a page at a time from the first page to the last.... :)