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.
Unlike the Checkbox which allows select/unselect option because it also allows multiple selected option -- you cannot do this in Radio option button.
Because the Radio Option button allows only one selected option at a time, you cannot select/unselect a selected option.
If you want to clear a selected option in the Radio option you will need to reset/refresh the browser itself or add a Reset button on the form.
But please take note of the consequence of refreshing the browser or using the Reset button -- it will also clear all answers and data currently in the form.
Another option you may want to use is to set to ON the 'Allow Other' option of the Radio option button.
This will allow response outside the specified selection options.
Hope this help. Let us know if you need more assistance.