Operating Garmin 530 without failed Play button

Does anyone know a way of operating a Garmin 530 without the Play button? Which has failed on mine.

I know you can auto start activities, but I am unsure how to stop and save them.

Garmin will fix their faulty button, but charged $180 for my wife’s device with the same endemic failure. So I’m a bit annoyed at paying them to fix their own defects.