When a tag’s row is selected in the tag list, the fully qualified tag name, or “UTag” appears in the tag field, just above the tag grid. A UTag (short for Universal Tag Name) is comprised of a tag’s location, source, and name, like so: “LOCATION.SOURCE.TAGNAME”. See Adding Tag to Displays for details on using the tag field.
Read Only: If checked, the tag field is not modifiable.