anchor.diff:  
   Every Nifty +++<abbr title="Graphical User Interface">GUI</abbr>+++ must have a start screen. The others (in this example, the HUD screen) are optional.
   
  +See: <<jme3/advanced/nifty_gui_overlay#,Nifty Gui Overlay>> to view your document as we progress through this tutorial.
  +
   NOTE: In the following examples, the XML schema header is abbreviated to just `<nifty>`.
   
   
   === Make Layers
   
   The following minimal XML file shows how we added layers to the start screen and HUD screen.
  -Delete all from the file and add following code:
  +Delete all from the file and add following code.
   
   [source,xml]
   ----
  
positive.code: 
  === Make Screens
  
  The following minimal XML file contains a start screen and a HUD screen. (Neither has been defined yet.)
  
  [source,xml]
  ----
  
negative.code: 
  == Adding Content to Panels
  
  See also link:https://versaweb.dl.sourceforge.net/project/nifty-gui/nifty-gui/1.3.2/nifty-gui-the-manual-1.3.2.pdf[Nifty GUI - the Manual: Layouts] on the Nifty +++<abbr title="Graphical User Interface">GUI</abbr>+++ site.
  
  
  === Add Images
  
  The
  <<../images/jme3/advanced/start-background.png#,start-background.png>> image is a fullscreen background picture. Add it to `Interface`. In the `start` screen, add the following image element:
  
  [source,xml]
  ----
  