Zanussi ZDG 58 - Manual (Page 8)

To turn off any burner
1 Push in the control knob and turn it to the off position.
This is shown by a large dot.
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For your safety
When you are lighting any burner check that it has lit before
you leave the oven.
When you are turning off a burner do not leave the oven until
the flame has gone out.
Lighting the oven and grill