There is a Uniwell UX-70 programming manual here:
http://the-checkout-tech.com/manuals/cashregisters/Uniwell_UX-60_UX-60F_UX-70_UX-70F_UX-75_UX-75F_UX-M720_type_05_programming_manual.html
This is what you need to change the settings
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February 2011