turn service reminder from off to on

[ckk125]

guys

i serviced my car last week, and the foreman put 1000km/6months for next service instead of 10 000 km.

i tried to reset it, but i turned it off by mistake..now dont know how to turn it on again.

any ideas? there are info is about how to off it, but cant find anything on how to on it.

Thanks