$ PEEK/SAVE_SCREEN/LOG /[NO]REOPEN

   Used to specify that new versions of a terminal-logging file
   should [not] be periodically opened.

   Example: $ PEEK/SAVE_SCREEN/LOG/REOPEN

   /REOPEN re-opens a new version of the log file whenever it
   reaches a certain number of disk blocks, or whenever a certain
   time of day or span of time has elapsed, providing at least a certain
   minimum number of blocks have been written to the file.

   The maximum and minimum blocks and the time of day and time span are
   specified using the /MAX_REOPEN, /MIN_REOPEN, /SPAN and /TIME_OF_DAY
   qualifiers, or by defaults for these which are specified in logical
   names.

   Each reopened log files has a copy of the initial full-screen at the
   time the log file was reopened.

   The default /REOPEN value is taken from the logical SAVE$REOPEN.

   /NOREOPEN is used on the command line to override a default
   /REOPEN value.

   (Note: /APPEND is ignored for PEEK/SAVE/LOG when /REOPEN is
   in effect.)