The axis labels show the number or category for each tick.

Option name	Type	Default
align	String	"center"
What part of the string the given position is anchored to. Can be one of "left", "center" or "right". In inverted charts, x axis label alignment and y axis alignment are swapped.
enabled	Boolean	true
Enable or disable the axis labels.
formatter	Function
Callback JavaScript function to format the label. The value is given by this.value. Defaults to: function() { return this.value; }
rotation	Number	0
Rotation of the labels in degrees.
staggerLines	Number	null
Horizontal axes only. The number of lines to spread the labels over to make room or tighter labels.
step	Number	null
To show only every n'th label on the axis, set the step to n. Setting the step to 2 shows every other label.
style	Array
CSS styles for the label.
x	Number	0
The x position offset of the label relative to the tick position on the axis.
y	Number	0
The y position offset of the label relative to the tick position on the axis.