Is it even possiable to do?
Whether you can change it or not depends on whether you mean in a web/HTML form or in a PDF.
For the web form the text boxes cannot be formatted, they have the outline by default.
If it is for PDF you can see this post where I describe how the border can be changed using Adobe Acrobat: Re: Can't get rid of black boxes when form is printed
Hi Josh, The link seems to be broken. Can you please tell how to do this, or where to find the page elsewhere? Thanks! Sonya
Sonya, I have fixed the link. Please try it again
Thanks Josh. I've created an endorsement for you, it's still blank, but this is what I said:
"Prompt, courteous and very helpful." : )