With my old mavic mini the video subtrack would show a nice readout of distance, height etc.
With my new mini 3 pro there is a confusing profusion of data on the screen with tiny printing. How can
I get a subset of data  that is useful?

Here's what it looks like:

I got this with the original mini:

I've found that Telemetry Overlay software works quite well for this.  I'm sure there are other ways also.

Hi there. Thank you for reaching out. The main reason for this might be the Mavic mini's subtitles are embedded in the videos originally while the DJI Mini 3 pro will generate a subtitle file separately and thus, the information showing in a small font but more detailed. We will coordinate this with our designated team also for attention. Thank you for your understanding and support.