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 <<user-content-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: killed at that point, regardless of how much longer it was planning to
  run.
  
  [[#held-flag]]Cues can also be created which run only as long as the
  corresponding controller pad is held down (this is done by passing a
  true value with the `:held` optional keyword argument when creating
  the cue). This is often done for intense effects like strobes.
  