Create empty text field for a product

Hello
I need an empty text field where people can write some comments while they are ordering some products. In my case I want to sell some adventure trips. For each person how is booking a trip there should be the possibility to write some comments, like he is vegetrian etc. How can I create a product related field.
Thank you

Peter

Hi,

In HikaShop > Display > Custom field, create a new custom field in the table "Item".
This custom field will be displayed on the product page and the user can enter text in it.