title: Mouseover text in a PDF file generated from python with matplotlib
body: <p>In a PDF file, when you place your mouse over a link, a mouseover text appears (in my PDF reader, in a yellow box). Is it possible to include this type of element in a PDF file generated from python with matplotlib? I want to get this mouseover text over a point of a figure and without a link to a website in the text.</p>
  
  <p>How can I do, starting with the following code? </p>
  
  <pre><code>import numpy as np
  import matplotlib.pyplot as plt
  N = 10
  x = np.random.rand(N)
  y = np.random.rand(N)
  fig = plt.figure()
  plt.scatter(x, y,label='http://website.com')
  plt.xlabel('x')
  plt.ylabel('y')
  plt.legend()
  plt.show()
  fig.savefig("myfig.pdf")
  </code></pre>
  
  <p>You can see the mouseover text box over the link in the legend in the generated PDF file myfig.pdf.</p>
  
  <p>Thanks for the help.</p>