How do you turn my overdrive on on a 2008 Kia Rio?

To turn on the overdrive in a 2008 Kia Rio, locate the overdrive button, which is typically on the gear shift or near the gear selector. Press the button to enable overdrive, which is usually indicated by an "OD" light on the dashboard. If the light is illuminated, overdrive is activated. If you want to disable it, simply press the button again.