anchor.diff:  increase from left to right, and Y coordinates increase from bottom to
   top. The web interface and registered grid controllers display 64 cues
   at a time in an 8&times;8 grid, and can be scrolled around that grid.
  -The user can set the web interface to track the scroll position of a
  -registered grid controller. When that is done, scrolling either
  -interface will cause the other to scroll in the same way, so the
  -browser window can act as documentation to help the user learn the cue
  -names associated with each available cue pad on the controller.
  +The user can configue (&ldquo;link&rdquo;) the web interface to track
  +the scroll position of a registered grid controller. When that is
  +done, scrolling either interface will cause the other to scroll in the
  +same way, so the browser window can act as documentation to help the
  +user learn the cue names associated with each available cue pad on the
  +controller.
   
   image::assets/ShowGrid.png[Web interface]
   
  
positive.code: http://deepsymmetry.org/afterglow/doc/afterglow.effects.cues.html#var-cue[API
  documentation] for the full details.
  
  [cols="2", options="header"]
  |===
  |Parameter
  |Purpose
  
negative.code: 
  |`:color`
  
  |Sets the color of the cue within the grid for hinting about its
  purpose and relatedness to other cues, to help operators learn and
  understand the interface. If not specified, white is used.
  
  |===
  
  