Highlight

A non-destructive review mode in PII detection tools that overlays a colored marker (often a semi-transparent fill in an entity-specific color) on every detected sensitive entity without altering the underlying document.

Highlight is the standard QA step before committing a permanent change. The reviewer sees exactly what the detection model flagged, confirms or rejects each match, and only then applies a destructive method such as Redact or Replace. Useful for catching false positives (a phone number that is actually a court case number) and false negatives (an unusual name format the model missed) before the document is shared. Because nothing is removed or replaced, a highlighted document still contains the original PII and is not safe to release externally.