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When a Route is in-progress, you will see the PRINT icon beside it at all times. 

The image below shows an example of the Print icon available for both a In-progress and a Completed Route.

By clicking "Print" on an in-progress Route, it will run the Route Report and show the data in its current state.

Note: Since the report is being invoked when the Route is still in-progress, it will have a watermark that indicates the in-progress state.