markerSettings property
Options to customize the markers that are displayed when trackball is enabled.
Trackball markers are used to provide information about the exact point
location, when the trackball is visible. You can add a shape to adorn each
data point. Trackball markers can be enabled by using the
markerVisibility property in TrackballMarkerSettings.
Provides the options like color, border width, border color and shape of the marker to customize the appearance.
Implementation
final TrackballMarkerSettings? markerSettings;