Sargent display menu settings

I've forgotten how to access the set up feature of the control panel, it's the one with the three arrow buttons on the right hand side of the colour display.
Also an explanation of how smart charging works would be good 

Thanks guys

Press and hold the up/down buttons together until beep. This gets to the hidden menu.
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Smart Charging here. [You must be registered and logged in to see this link.]

Thanks for the comprehensive reply that’s everything I needed to know