New Discount colum shoud have restriction

1- For staff user id if pre set discount value 20% then it should be allow between 0 to 20 rather than can be change more discount. by mistakenly staff giving discount unknowing when number of bill are more.which cousing business loss and manualy not possiable to check all invoice.

2- Sale billing page after zero stock in batch, still can be add product latter going minus stock . after Mannual adjust stock can be change but actually after batch stock ( 0 ) until product available, should note eacept in same batch .

3- Bar code option can be fix with 3rd party link at same place for direct print due to currently option not fully develop.

This are point need to be fix .

Thank you to the all team who given effort to add pre discount option in my bill book software.