If memory serves, you hit the mode once to get you into the engine temp screen, then press the set button down a couple times until the interval appears... if it is not in that group. press the mode button up once, and then repeat the set button a few times.
You can scroll through all the functions of the MFD by using the sequence:
At any time you can hold the Set button for a various amount of time to reset the screen you are on... it is best described in your Owners Manual, but this should give you a rough idea.