Default font family for all text, follows CSS font-family options.
size: number
Default font size (in px) for text. Does not apply to radialLinear scale point labels.
style:
| "normal"
| "italic"
| "oblique"
| "initial"
| "inherit"
Default font style. Does not apply to tooltip title or footer. Does not apply to chart title. Follows CSS font-style options (i.e. normal, italic, oblique, initial, inherit)