Track document changes in Dropbox Dash

I need to catch up on this document with not much time to do it. Its contents aren't enough. I need to know what has changed since last week. So I'll ask Dash to summarize. And now Dash has morphed into an interactive assistant that will not only help summarize, but offer relevant follow-up questions and answer my own questions.

This is especially handy for long documents, briefs, research, meeting notes, anything that you need to get the gist of what this doc is about. But specifically, I want to know what has changed since last week, so I'll ask.

Okay. Dash tells me that it doesn't have any information on changes made. So it looks like my team left the stock alone, and what I see is final.