http://wccftech.com/pixel-2-menu-button/

Google does not have a one-track mind when it decides to remove or add a feature. The tech giant ditched menu button for the recent apps button. At this point, most of the Android users are used to the recent apps button, but now Google thought of bringing back the menu button with the Pixel 2 lineup.

The Pixel 2 and Pixel 2 XL smartphones are now ready to be shipped to those who pre-ordered them online. At the time of launch, Google did not reveal much about the hidden menu option on the Pixel 2. We must say, it is a neat feature that Google integrated into the new phones.