Each individual horse in the race has a data screen. Enter the horse's name in the top line, program number in the next line, then enter the last three Beyer's and the last three speed and track variants as reported in the Daily Racing Form for the race, or use Brisnet, Multicaps, or JCapper Speed Figures and Speed and Track Variants.
If a horse has scratched, simply click the Scratched button and the horse will not be considered in the output of the Handicapping and sorting algorithms. If you want to delete a horse entirely, click Delete. Click Save Horse to store this entry in the race.