Unit of the range the button sets, with count; all autoranges the axis instead.
stepmode?
"backward" | "todate"
"backward"
backward: the range ends at the current range end and starts countsteps before it. todate: it starts at the start of the step period, count - 1 periods back (count: 1, step: 'year' is year-to-date).
templateitemname?
string
undefined
Name of a template button to inherit from. If no template item matches, this button is hidden (visible: false).