Comment by Phillipharryt

Programmer who also works in retail, uh no, this layout highlights all the wrong things. The list of items is half the screen, my current system has it at about 1/4 and buttons are enormous, very easy to use and rarely ever miss a button or hit the wrong one, this looks like that will happen all the time. Also we have a lot of colour in buttons that relate to use (payment buttons red, department buttons green, account buttons yellow), this has grey and grey and grey. It might work but I pity anyone using this system. I think with some more UI considerations for the actual use cases (what do register users need the item barcode for? I might enter it but once the item name pops up I don't need it taking up my screen) this could get good. I also don't need whitespace between buttons, have them as big as you can.