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# Device Pixel Ratio
By default the chart's canvas will use a 1:1 pixel ratio, unless the physical display has a higher pixel ratio (e.g. Retina displays).
For applications where a chart will be converted to a bitmap, or printed to a higher DPI medium it can be desirable to render the chart at a higher resolution than the default.
Setting `devicePixelRatio` to a value other than 1 will force the canvas size to be scaled by that amount, relative to the container size. There should be no visible difference on screen; the difference will only be visible when the image is zoomed or printed.
## Configuration Options
| Name | Type | Default | Description
| ---- | ---- | ------- | -----------
| `devicePixelRatio` | `Number` | window.devicePixelRatio | Override the window's default devicePixelRatio.