In the update box there was a link to this page. Evidently this page is suppose to describe the app. changes. I don't see any such thing.
When I bring up the UPDATE window for updating software, I saw that there was an update for iWork. I initiated the update. Also in the same window it said that I could find descriptions of "individual application changes" if I came to this page. I did that and could find nothing. Not much help, so I don't know really what has been changed.