1. Login your POS system, then scan or type your product code/product barcode.
2. You can also input product by pressing F1 key or click on Product.
3. Then input your product code criteria and search.
4. After that, press F2 key or click on Qty button.
5. Then key in your quantity or click on the button for the amount that you want and then press OK.
6. You have successfully changed the quantity amount.