Hi, I know this is years too late, but could help someone. I developed
this javascript for Acrobat Pro. I found someone that had a version of
it and build on it a bit more. Place this in the event custom
calculation. It is a bit iffy is you try to use it with rich text, but
fine for multi and single line and scrolling text. What happens is it
will set the font to auto originally so any length can be typed in and
it will shrink if needed. You can then set a character limit for size 12
to be appli...