| The PLplot Plotting Library: Programmer's Reference Manual | ||
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plgdidev: Get parameters that define current
      device-space window
      Get relative margin width, aspect ratio, and relative justification
      that define current device-space window.
      If plsdidev has not been called the default values pointed to by
      p_mar,
      p_aspect,
      p_jx, and
      p_jy
      will all be 0.
    
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