Documentation claims bbox-center|origin is a valid tag for the transform keyword. Claus (rotdrop) removed this addition of his from code in Oct 2006 (ie before 1.9.0) saying it was a 'bad idea', but it's still mentioned in docs.
I can delete the mention from the English docs, but not from the Portuguese, which needs to be kept in sync with the English docs (or needs to have a note added saying when it was last synced with the English).
Also, there's a difference in output of (help transform) between Geomview 1.8 and 1.9, which may be related (how dt and smooth are nested), and may be due to reverting this tag out. Needs to be checked by an expert - probably Claus.
