The update to Android 9 Pie brought gesture navigation to Android. Swiping up from the bottom takes the user home. Swipe up from the bottom and hold to access recent apps. Swipe in from either the left or right edge of the screen to go back. Swipe left or right from the navigation bar (the small handle at the bottom of the display) to switch between apps. Pixel users can switch from the gesture navigation to the three-button navigation by going to Settings > Display & touch > Navigation mode > 3-button navigation.
We’d love to tell you when you can expect this feature to appear, but alas, we can’t. Since it’s only code in Android Canary for now, there is no way to determine when-or even if, Google plans to launch this feature. We’re sure that those who have switched from a Galaxy device to a Pixel and had problems using the three-button navigation know exactly how this change could be very useful.