Scans the field searching for guide stars.
2=to: 2!:}Format: FIELD <nstar>
2=to: 2!:}Example: FIELD 1
2=to: 2!:}Default: nstar defaults to 1 if no argument is given.
2=to: 2!:}Comments: Causes the CCD autoguider to read out and search for guide stars, marking the brightest star in the field to use as a guide star.