The home button for a long time had been the way to easily go back to your home screen from anywhere on your phone, whether you're sending a text in the Messages app or scrolling through Instagram.

(1) A button on a smartphone, tablet or other electronic device that takes the user to the start screen (home screen). The button may be physical hardware or displayed on the touchscreen ("virtual ...

Same with photos. And because of all that screen that means there’s no Home button So instead of using a button to get back to the home screen, you just swipe up from the bottom. If you want to ...