When you make a sale in POS you are able to change some of the product information. This can be usefull if you need to make a quick change on the price of a product/item, before the sale is made.
When the item is added to the checkout window, simply tap on it and it will open.
You can then easily change the quantity, price and text.
You can also delete a single product/item in the checkout window by clicking the small icon with a trash can next to each item and it will then be removed in the checkout window.
If you want to delete everything or start over, you can click on trash can in the top right of the checkout window. After that all the products/items and the customer you have added to the order, will be removed.