Hi @koolkatwebdesigns
preview button
– This is not a builtin functionality of ACF so the simple answer is no. That said, it is always possible to create custom functionality. So you could create a submit button which uses a custom submit function. This function could create a new autosave and then redirect to a url with the preview ID. This would require a lot of logic and will not be easy.
additional HTML
– Yes, please look over the docs for the acf_form function, you will see a before and after argument where you can add to the HTML
Cheers
E
