Tip: If you have visual impairments, you can enable additional magnification
gestures.
Pinch in to zoom
Put two fingers on the screen, far apart, and then drag them together.
Result: Zoom out to see smaller version of photos or maps. Or, close expandable
notifications.
Press Power button twice
Press the Power button twice to open Google Assistant.
You can customize settings to open the camera instead.
Learn the basics : Get around on your phone 33