Timeline Viewer Cinematic F

I just downloaded 19 beta, and noticed a new option in the timeline viewer dropdown called "cinematic" with an icon with a camera and the letter "F". I'm not able to find anyone talking about this, or any documentation about it. Does anyone know what this is?

Screenshot 2024-04-24 at 4.43.19 PM.png (55.55 KiB) Viewed 278 times

I don't have that.

What page?

You are not alone, Jim, I don't either.

Possibly activates focus controls for the newly supported iPhone Cinematic format?

This was on the edit page viewer on my MacBook Air M1 running Davinci Resolve 19 beta. I opened the same project on my MacStudio M1 Max (also running Davinci Resolve 19 beta), and it didn't have this option. Must be something they're planning for a future release.