DCP-o-matic

I want to display the screenaspectratio setting to 1.85 or 2.39. Where to modify it?

This is calculated from the aspect ratio of the picture data, so to change it you would need to change that "Container" in the DCP - Video tab.

Is it a change here?
I changed it. It didn't work

At present, the setting format displayed in the software is like this. It's not the 1.85 or 2.39 format I wanted. I just want to ask how to get the result in this format. Thank you.

The 1.85 / 2.39 format is Interop, so if you want that you'd need to set your project to Interop. The version in your screenshot is the SMPTE standard.

Thank you very much.