If you want to make a note about the ingredients when buying a hamburger takeout, you can follow the steps below:

1. On the ordering page, enter the food you need add to the cart.

2. Click Checkout, then slide the page to the bottom.

3. In the remarks field, enter your request, such as "Please add more vegetables and sauces, thank you!"

4. After confirming your order, wait for the delivery into your hands.

Please note that different restaurants may have different ways to make notes, so it’s best to check the order fill page of your chosen restaurant to learn about their specific ways of making notes. In addition, some restaurants may not be able to accommodate your special requests, so please confirm whether the restaurant can accommodate your needs before placing an order.