As kfk says pressing the end of the wiper stalk alters the settings. If you press on the end quickly it will toggle between the computer settings 1,2 and 3 shown on your display. Holding the end down will zero the display your on. I use display one for general motoring, display two I zero when I fill up to give details on that tank of petrol and display three I haven't touched, to show what I have done since purchasing the car ie Distance travelled, mpg and average speed.