Add Custom Field "Item Pick Notes" to template

Add Custom Field "Item Pick Notes" to template

Is it possible to add a custom field to the Package Template / pick list?

When we do a pick list we have "Pick Notes" against our items.

Current Workflow
- Sales Order Created
- Print Pick List
- Each item has pick notes... EG
  - Line Item = HAT, pick notes would be "Add discount card with item"

I can add a custom field to each item call "Pick Notes" but how do I add that to the printed Pick List