any, is removed and no new tag is set. It is an error to set a tag
which already exists on another key, unless you give the
.B \-r
-option, which removes the tag first.
+option.
+.PP
+The following options are recognized.
+.TP
+.B "\-r, \-\-retag"
+Untag the existing key with the desired new tag, if any.
.SS "setattr"
Attaches attributes to a key. The key to which the attributes should be
attached is given by its