We utilize custom segments. I need to come up with a way to only print item descriptions on a transaction pdf if there in a user selectable set of values from a Custom Segment. I am planning on adding a column to the Transaction Line item, but having trouble coming up where to source this from. I can't edit the custom segment as it doesn't allow me (that I can see) to store additional values for each value of the custom segment, and there doesn't appear to be a way to add a custom field to a custom segment.

Rick did you get this figured out? When you create a custom segment, NS automatically configures a corresponding custom record, you can add your additional fields and info, there