I'm not interested in kph (never go abroad) but the "blank" box occasionally irritated me - it now read digital mph.
Thanks
 Geoff

Geoff, make sure you set the second display units to "As Trip Computer" rather than just MPH - that way if you did venture abroad and change the trip computer units to litres/kph the digital display would then display KPH.

Andy. 2015 L405 SDV8 Autobiography, Indus Silver with Black Pack.
SWMBO: 22MY Defender 110 HSE X Dynamic, Gondwana Stone.
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The IID tool can switch on the digital speedo box. I've done it on mine and the screen is for me now OCD friendly.