Until this morning’s update (10th Jan 23) I had nice compact inbox views. More than a dozen two-line message headers visible to scan through at once on my phone, two dozen on my 10" tablet.
Then K9 updated and it all went s-p-a-c-e-d-o-u-t, barely 9 emails visible on a 6" screen.
How do I get a compact view again? I can’t see anything in the settings.
See the replies at After updates, the list of messages is no longer as compact as before.
Even though you posted your query before I posted mine, I got an answer from the maintainer and you so far have not. I suspect that that is because you posted it in the General forum rather than the Support forum, which information might be useful to you in the future.