Here’s how to switch to the new Gmail theme:
1. Login to your Gmail account and click in the gear icon in the top right corner. Select ‘Mail settings’ from the drop-down menu.
2. On the settings page, click ‘Themes’.
3. Scroll down and click ‘Preview (Dense)’ if you have a small or regular sized screen or click ‘Preview’ if you have a large screen.
4. Enjoy the brand new, neat looking Gmail theme!