How do I hide text box outline
I am guessing you mean in a PDF created by FormsCentral, is that correct? If you mean in FormsCentral web forms there isn't anything you can do.
If you did mean in PDF there is still nothing you can do in FormsCentral but the question has been asked a few times and I have given a workaround for how to do it in Acrobat: http://forums.adobe.com/message/5817708#5817708
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