How to set the output presents to add the correct omr marks based on the result of preliminary data sorting?

Hi,

In our data sample, we have done a preliminary sorting and added one more field (called omr_mark_1) to mark the new envelope so that the multiple mails with the same mailing address could be inserted into one envelope. When we set up a output presents, what should we do to make sure this field (omr_mark_1) is really connected (or used) for the inserter?

Thanks,

John

What is contained in the omr_mark_1 field? A reference to an image file? Text?