title: Pandas dataframe.hist() change title size on subplot?
body: <p>I am manipulating DataFrame using pandas, Python.
  My data is 10000(rows) X 20(columns) and I am visualizing it, like this.</p>
  
  <pre><code>df.hist(figsize=(150,150))
  </code></pre>
  
  <p>However, if I make figsize bigger, each of subplots' title, which is name of each columns, get really small or graphs overlap each other and it makes impossible to distinguish.</p>
  
  <p>Is there any clever way to fix it?</p>
  
  <p>Thank you!</p>