What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
Unfortunately it is not possible to add a sub-label or a hover hint to the configurable list. However, you can add a hint text inside the text field of the configurable list by adding a third setting in the field configuration like in this example (Text Area : textarea : Hint Text). In this example, the text area will have a hint text shown as "Hint Text" inside the field.
Please see our guide here on How to Set Up the Configurable List Widget.