This didn't go down too well with many members of the Android community, but with the final release of Q just a few weeks away, Google has told them it's going to stay that way – and what's more, people will like it.
With the old three-button navigation system, the left button lets you scroll through open apps, the center button returns you to the home screen, and the right button takes you back.
After upgrading to Android Q, you swipe from the left or right edge of the screen to go back, and swipe from the bottom up to return to the home screen.
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The main complaint involves the new back gesture, which presents issues for apps that already use that gesture for tasks like opening menus.
Developers can choose to deactivate the back gesture entirely, or just for a section of the screen if it interferes too much.