The last update to Thunderbird just about made it unusable for me. I have poor eyes, so I need text to be in a very large font. In the past, I could squeeze down the header window to give me a larger reading area in Classic View. Now I cannot squeeze down that window, and so the text area is only four lines high. See image attached.
I could double click every email, and open each in a separate tab. But that is slow, and cumbersome, and the header window still takes up over half of the screen space.
I really don't need all that header info, and would be happy to have a 2 line header window.
I know I'm an exception to most folks with good vision, but it would be nice if your programmers didn't take away a feature that helped me in earlier versions of Thunderbird.