The Google Pixel 2 and 2 XL have a secret menu button, turns out it's a bug

In this week, more and more people will get be receiving delivery of the new Google Pixel 2 and Pixel 2 XL smartphones. Android Police first discovered a secret menu key that can be accessed through the Pixel 2’s navigation bar, which was later confirmed by CNET.

You can tap the lower right corner of the display, just to the right of the recent apps button and you’ll feel haptic feedback as if a button from the Nav bar was pressed. This button acts like the menu key, a button that used to be part of the Android’s set of Navigation keys before on-screen keys were introduced with the Samsung Galaxy Nexus and Android Ice Cream Sandwich.. 

Google has confirmed to CNET that this button is not a feature, but actually a bug in the software. Google intends to “fix” the ghost menu key in an upcoming OTA update. This means the hidden menu button isn’t going to stick around for much longer if we are to rely on Google.

Source www.cnet.com