This option is typically used by MinorTickShape. It dictates the width of the tick. For a tick on a horizontal axis, the width is the horizontal size of the tick.

Legal types of values are:

• number: int, double, etc.
• distance: Distance and FloatDistance.
• pixel distance: PixelDistance and FloatPixelDistance

The default value is 1px, or one pixel thick. Examples of legal values include:

• 2cm
• 1.5in
• 36pt
• 3px
• 36 (which is the same as 36pt)

Please see Shape.quantize-line-thickness for an explanation of how values are converted and quantized to pixels.

Minor ticks are not created by default; to create them, you must create your own subclass of ChartAxis or one of its implementations, and override ChartAxis.generate-minor-ticks.