BRIEF -- Opens a briefing window
   BRIEF window
Parameters:
   window | briefing window number; the range is 0-9 (def=0)
Remarks:
   Always choose a briefing window number that is not already in use.
   That is, do not create two or more briefing windows with the same
   number.

   Use briefing windows to display loops 1-9 saved with the DEFLOOP
   command.  To display a loop in a briefing window, use the MOVIE
   command with the WIN keyword, or make the briefing window active
   and press the keyboard key between 1 and 9 that corresponds to the
   loop number between 1 and 9.  Press L to manually start or stop
   looping, A to advance a frame, and B to back up a frame in the loop.

   BRIEF makes the briefing window the same size as frame 1.  If the
   loop you want to display in the briefing window was saved on frames
   of a different size, the loop's frames are rescaled to fill the
   briefing window.  For example, if the loop was saved on 700x900
   frames and the briefing window is 480x640, the loop's frames get
   rescaled to 480x640 so the entire frames are displayed.

   You can resize briefing windows with the sizing border.  The frames
   displayed in the briefing window will automatically be rescaled to
   fill the window.  However, if you make the briefing window smaller,
   the graphics on the displayed frames will deteriorate.  Press R to
   return the briefing window to its original size.

   There is a 250 millisecond delay between frame advances in a briefing
   window.  Thus, the fastest loop speed you can attain in a briefing
   window is 4 frames per second (even if you specified a much faster
   loop speed when you saved the loop with DEFLOOP).

   There is no McIDAS command to close (kill) a briefing window.  If you
   want to close it, either choose the window menu's "Close" option or
   wait until it's automatically closed when you exit McIDAS.
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