User confirmation for form submit

Hello,
I have a form to update data.Reading the "Submit confirmation" post dated October 26 Mr. GreyHead said is possible to load form and disable the submit button. Then checking a checkbox located above the button is possible to enable the button itself. I tried many tests in order to implement this but I didn't understood how to do that.
Thanks for an help
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P.S.
I am using Chronoform 6 free version and joomla version 3.8.2

Hi valgo54,
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In the Designer tab:
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+ set the button as disabled using the Extra Attributes box or a Custom CSS element.
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+ use the Events tab in the CheckBox element to enable the button.
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Bob

Thanks Bob for your prompt answer.

Hi Bob
it works,fine!
Thanks
Valerio