At this time, there isn't an option for just generic text boxes in sign up forms. Sign up forms are meant to collect specific sets of info for the purposes of mailing - e.g. names, addresses, dates, single-worded responses, etc. If you're wanting more advanced sign up form options, we'd advise creating your own form on your site, and connecting that to our API. Our Web Services team is available through their site and Community Dashboard for assistance with API connections.
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