If you want to add a product that is not on your menu, it is possible to create a new product at the time of ordering.
Be aware that this will only be saved in the order selected.
1. First of all, you have to make sure you have the module activated.
Go to your Back Office > Configuration> Your Modules > Order Taking Settings > Create a new product
2. Once the module is activated, whenever you take an order you can create an off-menu product.
3. On the order situated on the right there is a small round icon with an arrow inside, click on it.
4. Then select > Create a product.
5. Fill in all the data and press on the button > ADD in order to save it.