[Home](./index.md) > [puppeteer](./puppeteer.md) > [Viewport](./puppeteer.viewport.md) > [deviceScaleFactor](./puppeteer.viewport.devicescalefactor.md) ## Viewport.deviceScaleFactor property Specify device scale factor. See [devicePixelRatio](https://developer.mozilla.org/en-US/docs/Web/API/Window/devicePixelRatio) for more info. Signature: ```typescript deviceScaleFactor?: number; ```