With viewport you set the initial view of your tracking map spectators will see when loading the visualization of your event. The viewport works independent from objects such as tracks, points of interest, or splits. You can adjust these properties
mapbox style e.g. terrain, satellite, hybrid and dark,
longitude and latitude of where the map is centered initially,
direction and pitch.
Set and save the viewport in the map tab of your event builder.
Select from different mapbox styles.