Navigating around the map works the same as many other interactive maps (e.g. Google Maps) you may have used in the past.
To pan the map to a different location, use the click-and-drag method:
The overview map allows you to pan to a new location by moving the extent box.
There are a few different options for zooming the map.
The geolocate button will zoom the map to your current location.
The search bar will automatically zoom the map to the selected location for you.