We've simplified the user experience and here are some exciting changes. These changes were first previewed within Coming Soon.
Simplified Ribbon — A customizable single-row of the most frequently used buttons. Easily switch between classic and Simplified views and pin/unpin commands.
Design updates — Many small changes in the message list help highlight the things that matter. For example, names are bolded and flagged messages stand out with a yellow background. Message subjects are more prominent in the reading pane and the header now takes up less space, leaving more room for your content. Email and calendar response options, such as Reply or Accept buttons, are contextual to where you're working.
Tighter spacing — In response to feedback you left us on Coming Soon, we’ve added an option to tighten the spacing around menu buttons and see more messages at one time in the message list.