title: NSFont - How to get the right font?
body: <p>I would like to make a NSFont to describe Arial, normal, 30pt in height. So far I have:</p>
  
  <pre><code>    NSNumber *weight = [NSNumber numberWithFloat:1.0];
      NSNumber *slant = [NSNumber numberWithFloat:1.0];
      NSDictionary *fontTraits = [NSDictionary dictionaryWithObjectsAndKeys: weight, NSFontWeightTrait, slant, NSFontSlantTrait, nil];
      NSDictionary *fontAttributes = [NSDictionary dictionaryWithObjectsAndKeys: @"Arial", NSFontFaceAttribute, 
                                                                                 fontTraits, NSFontTraitsAttribute, nil];
      NSFontDescriptor *fontDescriptor = [NSFontDescriptor fontDescriptorWithFontAttributes: fontAttributes];
      NSFont *largeFont = [NSFont fontWithDescriptor: fontDescriptor size: 30];
  </code></pre>
  
  <p>but the resulting NSFont is not the right size. I can put any size I want in there and they all look the same.</p>