how can I use tabletool to export a large text column to pdf

blue80

I use datatables server side processing for mongodb. Everything works fine (multi column search, export to excel, csv ..). But when I exported to pdf, the large column (the last column) is all pushed to right as one character a line. Can I export all the short columns to one line, then the large column starts from new line and wrapped , example as:

first line: doc_id, load_date, author,
second line: the document content (it may be as big as over 16m)

or can I just export only the large column as a pdf doc wrapped by /n

Thanks for any help.