| color | string | Optional. Foreground color — strokes, arrowheads, and text (hex, rgb, or named color). | — |
| background | string | Optional. Background color for text-bearing annotations (hex, rgb, or named color). Use transparent for none. | — |
| strokeWidth | number | Optional. Line width in pixels.
Minimum: 0 | — |
| fontSize | number | Optional. Font size in pixels.
Minimum: 1 | — |
| fontFamily | string | Optional. Font family. Falls back through the list as in CSS. | — |
| opacity | number | Optional. Opacity, from 0 (invisible) to 1 (opaque).
Minimum: 0. Maximum: 1 | — |
| radius | number | Optional. Corner radius in pixels, for boxes and text backgrounds.
Minimum: 0 | — |
| padding | number | Optional. Padding in pixels inside text boxes, and between an outline and its element.
Minimum: 0 | — |
| maxWidth | number | Optional. Maximum width in pixels for text before it wraps.
Minimum: 1 | — |
| intensity | number | Optional. Blur strength. Higher values obscure more.
Minimum: 1 | — |
