title: Define linespacing using a Point-Value
body: <p>i have to write a paper where the chair claims a font size of 12pt AND a line-spacing of 15pt (which seems not to be \onehalfspacing).</p>
  
  <p>Can anyone tell me how to define the spacing using the value 15pt?</p>
  
  <p>Best regards and thanks!
  Philipp</p>