How to activate the new Gmail Look?
- In Gmail, click the gears icon (), and then choose Mail settings.
- On the Settings page, click the the Themes tab.
- Click either the Preview or Preview (Dense) theme.
The new Gmail interface will eventually expand dynamically to accommodate different screen sizes and user preferences, but until then, you can pick the information density that you prefer.
New Gmail Design
As per the Google Labs post about this feature you can switch back to any other theme at any point. So give your Gmail the new Look and enjoy. Do share here in the comments below of what you think of the new design.