Problem with DaVinci Resolve project

Hi all…fairly new user to DaVinci Resolve with only a couple of short films under my belt! I took the plunge with Envato to have a look at some templates…and immediately need some help from more experienced users. I downloaded this template. Modern Mosaic - Corporate Presentation // DaVinci Resolve, Video Templates - Envato Elements . I’m working on a Mac and the first thing I noticed was that most of the assets loaded into the project pointing to a Windows directory. I changed all those so I’ve not got any missing asset errors.

The problem I’m hoping I can get some help with is that when I play the final timeline render, I can only see a bit of the image. If I look at the fusion comp for the first scene I can see the whole of what I’d expect to see. I’m sure this is some amateur confusion on my part but any help would be appreciated.