title: How to expand a larger area in the content of an expander?
body: <p>I tried several times without finding how to expand a larger content in an expander without modifying the size of the header.</p>
  
  <p>My collapsed expander with its linear gradient:
  <img src="https://i.stack.imgur.com/H7hIu.png" alt="Collpased expander"></p>
  
  <p><strong>What I get</strong>
  <img src="https://i.stack.imgur.com/DMRTZ.png" alt="What I do NOT want"></p>
  
  <p>or when I increase the size of my content
  <img src="https://i.stack.imgur.com/to0Yt.png" alt="What I do NOT want"></p>
  
  <p><strong>What I want</strong>
  <img src="https://i.stack.imgur.com/oLdN0.png" alt="What I WANT"></p>
  
  <p>OR</p>
  
  <p><img src="https://i.stack.imgur.com/ykKzr.png" alt="What I WANT"></p>
  
  <p>I am working under Blend 4.
  Is it possible to do that ? Do you have a trick ? Can I keep the linear gradient ?</p>
  
  <p>Thank you for your help !</p>