[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Tracing](./puppeteer.protocol.tracing.md) > [StartRequest](./puppeteer.protocol.tracing.startrequest.md) > [transferMode](./puppeteer.protocol.tracing.startrequest.transfermode.md) ## Protocol.Tracing.StartRequest.transferMode property Whether to report trace events as series of dataCollected events or to save trace to a stream (defaults to `ReportEvents`). Signature: ```typescript transferMode?: ('ReportEvents' | 'ReturnAsStream'); ```