AeroPod, PowerPod and Newton

OK, I've spent awhile looking for this basic function.
How do you end a ride and start another, creating a new ride file?
Say on the same day I do a 15 mile ride. Then I stop for a just little bit, and want to start a new ride file. How do I do this? Normally there are large amounts of time between rides and PP seems to just figure it out, but what if there is very little time between?

Thanks, T Bruce

For stops of 20 minutes or less, PP will continue the previous ride file.

Longer than 20 min, PP will automatically start a new ride file.