Log into your Metropolis account at app.metropolis.io and select Extend Time on your current visit.
Select the amount of time you'd like to add to your visit and confirm the additional price. As you change the duration, you will see the visit end time update.
You can extend your visit as many times as you need. Your credit card will only be charged once at the end of your visit.
If you need to add time but your visit has already come to an end, you will have to go back to the lot and scan the QR code to start a new visit.