Blacklining works in conjunction with InDesign to allow a user to retain a complete audit trail of all changes made to text. Those who work with financial, legal, medical and other exact documentation will find this an essential tool.
Blacklining tracks changes made to the text of a document as it is being revised. It is designed to allow a user or viewer of a document to be able to see a complete history of changes that have occurred. Text inserts are shown as underlines and text deletes can either be shown as strike through, or have a caret mark from where text has been deleted.