-Note that since only SSH2 keys come in different formats, the export
-options are not available if you have generated an SSH1 key.
+For OpenSSH there are two options. Modern OpenSSH actually has two
+formats it uses for storing private keys. \q{Export OpenSSH key}
+will automatically choose the oldest format supported for the key
+type, for maximum backward compatibility with older versions of
+OpenSSH; for newer key types like Ed25519, it will use the newer
+format as that is the only legal option. If you have some specific
+reason for wanting to use OpenSSH's newer format even for RSA, DSA,
+or ECDSA keys, you can choose \q{Export OpenSSH key (force new file
+format)}.
+
+Note that since only SSH-2 keys come in different formats, the export
+options are not available if you have generated an SSH-1 key.