When you open the Citizen app, the map will default to showing you the entirety of New York City or San Francisco, depending on your location. The incidents that appear in the Recent and Trending tabs will correspond to your map's current view.
To instantly zoom into your immediate location and view local incidents, press the toggle button in the bottom right corner of the map screen:
To zoom back out to the entire city, simply press the toggle button again. Additionally, you can manually zoom and scroll on the map to see incidents across the entire city.