anchor.diff:  buttons of your controller, while simultaneously being able to control
   others via the screen and mouse. To do that, simply use the link menu
   to turn off the link.
  +
  +The final section of the show control interface lets you view and
  +adjust the Metronome that the show is using to keep time with the
  +music that is being played. Since Afterglow's effects are generally
  +defined with respect to the metronome, it is important to keep it
  +synchronized with the music. The metronome section shows the current
  +speed, in Beats Per Minute, of the metronome, and the `Tap Tempo`
  +button label flashes yellow at each beat. It also shows you the
  +current phrase number, the bar within that phrase, and beat within
  +that bar which has been reached.
  +
  +image:assets/Metronome.png[Metronome]
  +
  +The most basic way of synchronizing the metronome is to click the `Tap
  +Tempo` button at each beat of the music. After a few clicks, the
  +metronome will be approximately synchronized to the music. You can
  +also adjust the BPM by dragging the slider along the bottom, or
  +fine-tune it with the `+` and `-` buttons around the current BPM
  +value.
  +
  +In order to make longer chases and effects line up properly with the
  +music, you will also want to make sure the count is right, that the
  +beat number shows `1` on the down beat, and that the bar numbers are
  +right as well, so that the start of a phrase is reflected as bar
  +number `1`. You can adjust those with the `+` and `-` buttons around
  +the Bar and Beat numbers. A shortcut that you can use right as a
  +phrase begins is to click the red `x` button above the phrase number,
  +which resets the metronome to Phrase 1, Bar 1, Beat 1.
  +
  +
  
positive.code: the larger grid. If there are more cues available in a given
  direction, that arrow will be enabled, otherwise it is dimmed.
  Clicking an active arrow scrolls the view one page in that direction.
  
  image:assets/CueScroll.png[Show control,align="right"]
  
  
negative.code: reflect this (by using the same keyword to register their effects with
  the show), when you activate one, the other cues which use the same
  keyword are dimmed. This is a hint that when you activate one of them,
  it will _replace_ the others, rather than running at the
  same time.
  
  The show may have many more cues than fit on the screen at once; the
  