anchor.diff:  |===
   
   [cols="1a,5a", options="header"]
  -.[[#cue-variables]]Cue variable specification maps
  +.[[cue-variables]]Cue variable specification maps
   |===
   |Key
   |Purpose
  
positive.code: add to the show. This is done so that a fresh instance of the effect
  is used each time the cue is triggered, in case the effect is complex
  and maintains its own state. The effect creation function will be
  passed a map containing any <<cue-variables,cue-specific variable bindings>>.
  
  There are a number of optional keyword parameters which can be used to
  modify the cue that is created. A summary of some features are
  
negative.code: 
  |`:held`
  
  |As described <<user-content-held-flag,above>>, causes the cue's effect to run only
  as long as the corresponding controller button or pad is held down, if
  the controller supports that capability. Currently the web interface
  does not, but the
  