When one has added a WFFM form to a Sitecore Item, you can go to the Presentation Details and click on Form. There you'll see an option called ReadQueryString - Reads initial values from the url query string.
My form has a few fields, one of which being Email. I tried adding ?Email=test to the URL of the page that hosts this form, but the value is not being picked up. Am I correctly understanding the intended purpose of this option? Am I using it correctly?
Sitecore version 6.5; Web Forms for Marketers version 2.3