Scrolling textboxes

i followed the tutorial for the dynamically loaded textbox, it worked fine, but there seems to be a set width for text, which i cannot seem to get around. In the .txt document, i cannot fit all the text in the textbox, to be able to view it, i have to scroll across from the bottom of the textbox, this is something that i definitely do not want, as i don’t want a horizontal scroll bar.
Altering the font size in the .txt document does not seem to have any effect. does any one have any ideas…?:q:

maybe this will work
myTextFormat = new TextFormat();
myTextFormat.size = 16;
myTextField.setTextFormat(myTextFormat);

this script changes text size.