Allow only one checkbox to be selected

[Slats Highlander]

Hi all

I have a text field that is functioning as a checkbox. There are three options Yes, No and Process.

As it is now any or all of the boxes can be checked. I would like it to allow only one box to be checked so that if one was checked to "no" it is automatically unchecked if "yes" or "process" is selected.

Many thanks in advance.

[comment]

See here?

[Slats Highlander]

Thanks that was just what I needed.