title: What does autoresize = RM+BM mean?
body: <p>I get this when using the Xcode debugging console with this line:</p>
  
  <pre><code>po [[UIWindow keyWindow] recursiveDescription]
  </code></pre>
  
  <p>Then I get back lines with the recursive description like this</p>
  
  <pre><code>&lt;UILabel: 0xb0b8170; frame = (138 106; 200 15); text = 'Distance'; clipsToBounds = YES; opaque = NO; autoresize = RM+BM; userInteractionEnabled = NO; layer = &lt;CALayer: 0xb0b8220&gt;&gt;
  </code></pre>
  
  <p>What does "autoresize = RM+BM" and is there a place I can lookup the meaning of the letters? I also saw something like this "autoresize = LM+W+RM+TM+H+BM".</p>