Preview Gmail's New look...Its really cool..

Couple of days ago gmail team released two new themes for gmail(Preview and Preview(Dense)).It gives a simple,cleaner and more modern look for gmail compared to other themes.Here is the difference between the classic theme and Preview theme

This is the classic theme



After applying Preview Theme the gmail will look like this



As you can see there is significant difference in displaying messages.They had changed the line spacing between the mails and advertisements now displayed on the bottom rather than top.To know more about the Preview theme go to http://gmailblog.blogspot.com/2011/06/preview-of-gmails-new-look.html
To activate the Preview theme go to

Mail settings ->Themes Tab->Select Preview or Preview(Dense)..its done