I created a custom field of type radio (vegetable family). In the general tab, I added a list of choices.
Now, when I create a new custom post, I see my custom field "Vegetable Family" with the predefined list of different options.
In this page I would like to have a button that allows me to add a vegetable family option without having to go back to the edit of my custom field and add this additional option in the predefined list.
ACF has this option : Add "other" to allow a custom value