| The PLplot Plotting Library: Programmer's Reference Manual | ||
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plsdidev: Set parameters that define current
      device-space window
      Set relative margin width, aspect ratio, and relative
      justification that define current device-space window.  If you want to just use the previous value for any of
      these, just pass in the magic value PL_NOTSET. It is unlikely that one
      should ever need to change the aspect ratio but it's in there for
      completeness.
      If plsdidev is not called the default values
      of mar,
      jx, and
      jy
      are all 0. aspect
      is set to a device-specific value.
    
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