title: Set size of ticks in all subplots
body: <p>I have a plt.figure(...) with several subplots, my code looks essentially like this:</p>
  
  <pre><code>num_plots = 2
  
  my_dpi = 96 
  fig_size = (1440 / my_dpi, 900 / my_dpi)
  
  fig = plt.figure(figsize=fig_size, dpi=my_dpi, frameon=False)
  
  # Subplot 1
  fig.add_subplot(num_plots, 1, 1)
  # plot fancy stuff
  
  # Subplot 2
  fig.add_subplot(num_plots, 1, 2)
  # plot fancy stuff
  </code></pre>
  
  <p>What I would love to have is something like</p>
  
  <pre><code>fig.get_all_subplots.xtick(size='small')
  </code></pre>
  
  <p>Thank you for your support!</p>
  
  <p>EDIT:</p>
  
  <p>I think it should rather be something like <em>plt.get_all_subplots</em> instead of <em>fig.get_all_subplots</em></p>