Starts the Autoguider tracking a star or stops it.
2=to: 2!:}Format: GUIDE ON <n> or GUIDE OFF
2=to: 2!:}Example: GUIDE ON 1
2=to: 2!:}Comments: Starts or stops the Autoguider following a guide star. n specifies the rank of the guide star in order of brightness, and defaults to 1.