I have created a SharePoint web part page, then I added a Nintex form web part and configured it, it works fine if I set the value of Item ID parameter manually. However, this is not what I want to achieve. I want to set its value dynamically using Query String/URL Parameter. How do I set its value to accept a parameter instead of a number.
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Hey! I know, it's been a while. Have you figured it out? If yes - can you tell how you did it? If not... Then possibly you could try to play around using the "Filter" webparts from SharePoint web parts gallery - there is one that allows to retrieve attributes from URL and passing them to other web parts.
If still not, maybe that could be handy for you? Nintex Forms – Reading Query String Values | The SharePoint Pub