Why is my Google Maps not zooming in?
The shortcut is simple: just double-tap the maps interface, but instead of lifting your finger after the second tap (the shortcut for zooming in), you leave it touching the screen. Then a swipe up zooms out, and a swipe down zooms in.
How do you zoom in on Google Maps on a Mac?
Zoom in and out: Click the zoom buttons ( and ) in the lower-right corner of the map. To show the map's scale as you zoom, choose View > Show Scale. The scale appears in the upper-left corner. Move up or down, left or right: Click and hold the mouse or trackpad, then drag the map.