how do i turn reset the service engine lite on the dashboard on 2008 Toyota Prius

how do i reset the service engine lite on my dashboard in my 2008 toyota prius

Asked by for the 2008 Toyota Prius
If it is the same as 2007, get odometer to reading miles (not trip) turn the Power button off, Press Power button twice to get ignition on while all the time holding down the trip reset button for about 6 seconds you will see the display read 000000,or - - - - - the light will reset.
What is a power button?