There's no way to make a short summary appear below the subject in Thunderbird's left panel (like it is in Apple Mail). However, if all you care about is the s

There's no way to make a short summary appear below the subject in Thunderbird's left panel (like it is in Apple Mail). However, if all you care about is the subject, you can hide all of the other columns in the table, and that should get you most of the way there. But that's about the best you can do.