By very rough measurement it's reducing the email display area by about an inch, dropping it from 4" to 3". I really don't want that, myself. I open an email because I want to read the email. That's my primary focus. One of the really nice things about the K9 interface has been that so much of the screen gets dedicated to the thing I actually care about (contrast this to the way that web interfaces like outlook.com love to almost relegate the email content to the bottom most corner)