-without arguments. If the data on standard input contains
-multiple keys (e.g. a primary key and associated subkeys), you must
-specify a specific OpenPGP keyid (e.g. CCD2ED94D21739E9) or
-fingerprint as the first argument to indicate which key to export.
-The keyid must be exactly 16 hex characters.
+without arguments. If the data on standard input contains multiple
+keys (e.g. a primary key and associated subkeys), you must specify a
+specific OpenPGP key identifier as the first argument to indicate
+which key to export. The key ID is normally the 40 hex digit OpenPGP
+fingerprint of the key or subkey desired, but
+.Nm
+will accept as few as the last 8 digits of the fingerprint as a key
+ID.