[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Page](./puppeteer.protocol.page.md) > [SetDeviceOrientationOverrideRequest](./puppeteer.protocol.page.setdeviceorientationoverriderequest.md) > [alpha](./puppeteer.protocol.page.setdeviceorientationoverriderequest.alpha.md) ## Protocol.Page.SetDeviceOrientationOverrideRequest.alpha property Mock alpha Signature: ```typescript alpha: number; ```