anchor.diff:  
   [width="{pdm-width}", halign="center", float="right"]
   |===========
  -| Actors
  +n| Actors
   | Application
   | Java VM
   | OS (Hardware)
  
positive.code: 
  [width="50%", halign="center", align="center"]
  |===========
  | *Actors* +
  Usage patterns
  | *Application* +
  Locks, External systems
  | *Java VM* +
  Memory, Process
  | *OS (Hardware)* +
  CPU, Memory, Disk IO, Network, Locks
  |===========
  
  
negative.code: [width="{pdm-width}", halign="center", float="right"]
  |===========
  | {nbsp}
  r| Application
  | Java VM
  | OS (Hardware)
  |===========
  