How can I uncheck an option in the check button widget?

How can I undo a checked button in the widget "check button" when I am in a form.  If I decide that I don't want at all to check the button, I cannot uncheck that button?

Thank You!

Can you share us your form here? Let us know what field. If you mean the radio button field, you cannot uncheck a radio button option. If you want to give your form users the option to uncheck all items, you have to use our Check Box field.