We have good news for everyone who didn't like the small, docked window for composing messages in Gmail. Google has listened to our complaints and is rolling out a new full-screen option.
With the option enabled, the revamped compose window will be centred in your inbox and can be expanded to fit your screen. (When the update rolls around to you over the next few days, you won't have to use a shortcut to open the message in a new window.)
You'll also be able to click an arrow to switch to full screen or set the full-screen view as the default. Finally, solving another annoyance: the formatting toolbar will be on by default with the new compose window.