How to change the current route in Garmin Nuvi GPS

Garmin Nuvi GPS has a "detour" function, which allows you to change to a different route from the current, to go to the same destination you are heading to.

When you are in the map screen, tap on the Menu button will bring you back to the main screen. If you are on the way to a destination, you will be able to see the "Detour" button below "Where to?". Just tap on it to make a detour.