We are introducing a redesigned compose experience in Gmail that saves you time, uses less screen space, and is simple to use. The new compose experience opens a window at the bottom of your inbox. You can compose multiple messages at once, search through your inbox and even reply to other messages all while keeping your new draft open.

NOTE: All users will be able to temporarily opt-out of this new experience.

Release track:
Scheduled release

Release Date:
April 16th, 2013

Editions included:
Google Apps, Google Apps for Business, Government and Education

For more information:
http://learn.googleapps.com/new-gmail-compose
http://support.google.com/mail/bin/answer.py?answer=2645922
http://gmailblog.blogspot.com.au/2013/03/gmails-new-compose-now-default.html

whatsnew.googleapps.com
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