[m463]

I'm not running the latest os.

On my displays I could only get the list of resolutions for my monitor, even holding down alt with preferences.

Meanwhile apple displays showed this dialog:

https://support.apple.com/library/content/dam/edam/applecare...

Maybe the latest OS allows it?

[lightbulbjim]

Yeah, maybe it's the OS version. I'm running Catalina and I see the scaling options from that screenshot for my external non-Apple monitor.