Vauxhall CORSA Owner's Manual page 44

42 Seats, restraints
Height adjustment
1. Pull belt out slightly.
2. Shift the height adjuster upwards
or press button to disengage and
push the height adjuster
downwards.
Adjust the height so that the belt lies
across the shoulder. It must not lie
across the throat or upper arm.
Do not adjust while driving.
Unfasten
To release belt, press red button on
belt buckle.