Unknown App Segments

[neebah]

Is there a way to get an unknown APP segment to show up in the exiftool printout and if so what are the groups for such a segment.  I can see it in the HTML dump and I can remove such segments, but didn't know how to generally display them.  Thought it might require using the -u modifiers. 

[Phil Harvey]

No tags may be extracted from unknown APP segments, so the only way to see them is with the -htmldump or -v3 (or greater) options.

- Phil