Your Windows Regional settings control the display of numbers in regard to comma , and dot . Notice how my decimal separator is dot while your is comma.
I do not think there is a way to remove the decimal from the display. Though there is a feature regarding “Auto Decimals”. Check here to see how it works:
You can remove the grouping symbol (i.e. dot in your case) through Regional settings as well…
In the case of the numbers displayed on the Numberpad, I am not aware of a way to alter their values in the case if you were to want 000 in pace of the decimal separator character.
That said, it could be a feature request, since we have the option to define custom keyboards in other parts of SambaPOS, it could probably be implemented to work on the Payment screen as well.