/[NO]KEYS_ERASE

   Controls whether any existing hot-key definitions are also erased as
   part of a DISALLOW command.

   Example: $ PEEK/DISALLOW/NOKEYS_ERASE

   All previously granted PEEK/ALLOW permissions are revoked, but any
   hot-keys defined via previous PEEK/ALLOW commands are retained.

   The default value is taken from the logical USER$KEYS_ERASE, usually
   defined system-wide by PEEK_DEFAULTS.COM.