%N pgbbuf %F $MIR/src/pgbbuf.f
%D Begin batch of output (buffer)
%B
      SUBROUTINE PGBBUF

 Begin saving graphical output commands in an internal buffer; the
 commands are held until a matching PGEBUF call (or until the buffer
 is emptied by PGUPDT). This can greatly improve the efficiency of
 PGPLOT.  PGBBUF increments an internal counter, while PGEBUF
 decrements this counter and flushes the buffer to the output
 device when the counter drops to zero.  PGBBUF and PGEBUF calls
 should always be paired.

 Arguments: none
