title: How to set transparency to HUD Window
body: <p>I am using standard HUD window (Drag and drop from IB Library). But I don't see any control to set the transparency of this HUD window.</p>
  
  <p>I also tried to customize  NSPanel to create HUD window . But whatever the alpha value I set. It takes default alpha value. One more problem in this approach is I think I need to draw tittle bar. </p>
  
  <p>Any solution or alternate solution is appreciated.</p>