# 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.

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