While pinch-to-zoom is a really simple and intuitive gesture, it’s awkward to do while holding your device with one hand. This little known alternative lets you zoom in and out with just one finger on the screen. Double tap, slide up to zoom in, down to zoom out.
Super useful when navigating unfamiliar territory with your hands full. This simple gesture will likely save your phone from hitting the pavement, and it appears to be working on both Android and iOS versions on Google Maps.