How do I configure my ZoneTick to display GMT time?
By default ZoneTick shows a couple of clocks after installation: your local time and London. London uses a time zone with daylight saving on. You need to change the time zone for your second clock to GMT. Usually it’s called (GMT) Casablanca, Monrovia. Just double-click on the London clock and change the time zone in the Preferences window that appears.
