Google provides two new themes for Gmail is Preview and Preview (Dense). The new interface has minimal look and brings s lighter and cleaner look to your Gmail inbox. This theme is suitable for user who like simple design or interface for Gmail account.
It's not the default just yet, so to turn it on:
- Login to your Gmail and go to Mail Setting (click wheel icon on the top right corner)
- Go to Themes tab
- Scroll down you browser and on the bottom you will see Preview and Preview (Dense). Click one of them to change your theme.
- That's all
Read a preview of Gmail's new look on Gmail Blog