How to set required fields in the Configurable List Widget ?

In addition to this the customer who fills in the form should also have to indicate for how many people (or how many pieces or how many liters). In the example above I was able to post the form without filling in the number of pieces with the dish "mini quiche Lorraine".

You can set a field as required into the configurable list, you just have to add an asterisk before the field configuration, you can find more details about how to set up the configurable list on this link :

http://www.jotform.com/help/282-How-to-Set-Up-the-Configurable-List-Widget

Let us know if you have more questions, we will be glad to assist you.

Regards.