/[NO]KEYS_ERASE

   Controls whether any existing hot-key definitions are also erased
   as part of the implicit DISALLOW command which is done when
   /NOCUMULATIVE is in effect.

   Example:  $ PEEK/ALLOW/NOCUMULATIVE/NOKEYS_ERASE J_DOE

   All former PEEK/ALLOW permissions are cancelled prior to ALLOWing
   J_DOE to watch, but any hot-keys previously defined via PEEK/ALLOW
   are retained.

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