don't want to print the undo transaction record

Hi all,

i am having trouble when i want to print the document. when it has the undo record, the system just print all of it , right ? do anyone know how to print only NON-undo lines?

for example
line 1 Qty 100
line 2 Qty -100
line 3 Qty 20

print only line 3.

many thanks,