Erply POS has the functionality to highlight full payment buttons to be able to see which full payment method is selected at the moment (card 100%, cash 100% buttons in POS Payment window).
It can be useful in case if the cashier gets distracted by some another task and needs to understand quickly what button was selected.
In order to do that, please navigate to POS -> Settings -> Configuration -> User Interface -> Miscellaneous -> Highlight full payment buttons.
Then if you go to the Payment window and choose any of the full payment options, you will be able to have this button highlighted.
