title: how to reduce branch length in ggtree
body: <p>I am trying to reduce branch length of the tree in <code>ggtree</code> with the following code:</p>
  <pre><code>ggtree(tree) +
     geom_tiplab() + 
     xlim(0, 0.08)
  </code></pre>
  <p>But it does not work. How to regulate branch length? I manage to produce this picture.<a href="https://i.stack.imgur.com/fNCac.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/fNCac.png" alt="enter image description here" /></a></p>
  <p>Could you please help with this.</p>
  <p>Ideally, I need a tree as in the picture attached. <a href="https://i.stack.imgur.com/2yagk.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2yagk.png" alt="enter image description here" /></a></p>