anchor.diff:  
   ==== Button Control
   
  -Our +++<abbr title="Graphical User Interface">GUI</abbr>+++ plan asks for two buttons on the start screen. You add the Start and Quit buttons to the bottom panel of the `start` screen using the `&lt;control&gt;` element:
  +Our +++<abbr title="Graphical User Interface">GUI</abbr>+++ plan asks for two buttons on the start screen. You add the Start and Quit buttons to the bottom panel of the `start` screen using the `<control>` element:
   
   [source,xml]
   ----
  
positive.code: ----
  
  In a layer, you can now add panels and arrange them. Panels are containers that mark the areas where you want to display text, images, or controls (buttons etc) later. To connect a screen with a ScreenController you need to specify the fully qualified class name of
  your ScreenController in the controller attribute of the <screen> tag. For this example, we use the `DefaultScreenController`. 
  
  
  === Make Panels
  
negative.code: 
  ==== Other Controls
  
  Nifty additionally offers many customizable controls such as check boxes, text fields, menus, chats, tabs, …
  
  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: Elements]
  *  link:https://github.com/nifty-gui/nifty-gui/wiki/Controls[Controls]
  
  == Intermediate Result
  
  