Recently Gmail team has started rolling their new layout for all users, this new layout is quite good and minimal too and many users has liked it.
But there are lots of users too who hadn’t liked it and they want their old layout back in action, well actually Google is going to roll it out completely in some time but till then you can get your old layout back.
To get it back login to your Gmail account and then just click on Setting button at the top-right corner of your page and the select Revert To The Old Look.
You must keep in mind that this is temporary method and once Google roll out this new look completely then you will lose old layout it.
To know more take a look at the video below :-