dynamically change the field/text box size.

I have a report that is built as a free form. One record for 1-BOL with its details on 1 page.

I have place all my fields in detail section. The problem is with the comments section formatting.

For some records, the comments are just 1 liner, but for some its like a 3 to 4 liner paragraph.

Solution that i am looking is to have a comment box that expand and retract based on its content size.

any ideas?