title: How do you use gnuplot's built-in fonts?
body: <p>The gnuplot docs have this to say about fonts:</p>
  
  <pre>    Five basic fonts are supported directly by the gd library. These are
      `tiny` (5x8 pixels), `small` (6x12 pixels), `medium`, (7x13 Bold), 
      `large` (8x16) or `giant` (9x15 pixels).</pre>
  
  <p>But when i try to use one:</p>
  
  <pre>    gnuplot> set terminal png font tiny</pre>
  
  <p>I get:</p>
  
  <pre>    Could not find/open font when opening font tiny, using default</pre>
  
  <p>How do I use these seemingly built-in fonts?</p>