The Gmail redesign was a UX Design test I was given. The 1 Hour test was to redesign Google’s Gmail to create a better User Experience for the user.
The theory behind this design was for the users to work their way across the screen left to right. Left being the high level tools and options such as compose, inbox etc and the more you move to the right the more specific the tools would be such as creating emails. You can also view recent activity you have had with the person you are email such as recent emails, sent files and contact info.