Typically, I’ll use WagerMate the night before a race to start my handicapping.  At that point, the “also eligible” horses are still included, so if I click “Scratch Horses” on the Handicapping tab…

…I’ll see every horse on the card…

When I do the same thing a little before post time, WagerMate will download the latest scratch data, so that I see near-real-time information about the horses running…

If my pick for the race has been scratched, I can simply re-run the WagerMate simulations — WagerMate will automatically exclude the scratched horses.

You can also use this window to manually “scratch” any horses in the race, if you have a reason to exclude them (e.g. post position).  This screen shot shows that I’ve told WagerMate to skip horses #1 and #2 when running the simulations.  When I re-run the simulation, they’ll be treated as if they were scratched, and WagerMate will pick other horses to bet on.

Two horses manually scratched