Defines the properties that can be set for the text that is displayed by the scale markers.
Object
Specifies a callback function that returns the text to be displayed in scale markers.
Function
Information on the marker value.
Date
Number
The raw value.
String
The formatted value converted to a string.
The text for the label to display.
this
Formats a value before it is displayed in a scale marker.
Format
See the format section for details on accepted values.