@041cd8c8 Try App Menu (≡) > Density and Font settings? 

You can also switch to Cards view, which is less information-dense. 

More tips here if you need them: https://blog.thunderbird.net/2023/08/make-thunderbird-yours-how-to-get-the-thunderbird-115-supernova-look/ 

 @40b06bed Thanks! "Density" was the thing I was looking for. I may try out the "Cards View" at some point, but for now I'm happy my emails can breathe again. ;) 

 @041cd8c8 Awesome, glad that did the trick!