How to easily zoom in and out with just one finger (Google apps)
Well, as it turns out, Good Guy Google has built a gesture in some of its apps that allows users to zoom in and out of a page or image, as far as they want, mind you, with just one finger. So far, we've found the feature to work in Google Photos, Google Maps, and Google Chrome (although the gesture does not work in iOS Chrome, only Android).
So, how do you do it? Well, it's that simple – double-tap on the screen as you normally would, but don't lift your finger after the second tap – hold it on there. Now, when you slide your finger down, you zoom in, when you slide up – zoom out. Check out the graphical guides below: