Posted by a ceTe Software moderator
Hello,
When you set the font size to zero with our API, the resulting auto font resizing behavior you are seeing in the PDF viewer is most likely a feature of that PDF viewer. With our API, it is not possible to assign a base font size for the form field. Also please note that there is no property or method available in DynamicPDF API using which you can make the form field to resize font automatically and/or specify a base font size for auto resizing.
Thanks,
ceTe Software Support Team.