title: ps2pdf: preserve page size
body: <p>I have <code>myfile.ps</code> with a vector image included.
  But when I run</p>
  
  <pre><code>ps2pdf myfile.ps
  </code></pre>
  
  <p>it seems that the output page size is A4: the vector image is too large and become cut away, so about one inch is lost.</p>
  
  <p>The following pseudo-header is printed in the output PDF file, in addition to the original vector image:</p>
  
  <pre><code>PLOT SIZE:8.02x8.62Inches
  Magnification:7354.21X
  </code></pre>
  
  <p>Is there any option or any way to convert the PS file to a PDF <em>preserving</em> the original paper size?</p>