title: Start a <p:selectCheckboxMenu> expanded?
body: <p>I feel like this is a simple question, but all of my googling and reading has not presented an answer.  That being said, I am still very new to JSF (PF).</p>
  
  <p>Anyways, I am using the <a href="http://www.primefaces.org/showcase/ui/selectCheckboxMenu.jsf" rel="nofollow noreferrer" title="SelectManyCheckbox">SelectCheckboxMenu</a> component from <a href="http://www.primefaces.org/" rel="nofollow noreferrer" title="PrimeFaces">PrimeFaces</a> and want to know how I can start it "expanded" or "open" without requiring the click to open it up.</p>
  
  <p>Here is how it looks normally when initially rendered:</p>
  
  <p><img src="https://i.stack.imgur.com/6mx3v.png" alt="Movies Unexpanded Image"></p>
  
  <p>Here is how I would like it to look when initially rendered, without using a mouseclick to expand it:</p>
  
  <p><img src="https://i.stack.imgur.com/zNIOk.png" alt="enter image description here"></p>