forms

I am a newbie to PDF forms and have run into what appears to be a problem with multiple line text fields. When I test the form and fill it in beyond the visible boundary (creating a scroll bar) and then subsequently try to view it using acrobat reader, etc. I see a "+" in the bottom right corner of the field but I cannot seem to get at the rest of the text to view it. And what about printing this sort of form? Have I constructed the original field incorrectly? Thanks in advance.